AC Repair Milwaukee, WI
When your air conditioner stops working in the middle of a Wisconsin summer, it is not a minor inconvenience. It is an emergency. Milwaukee summers regularly push into the 85 to 95F range, and when Lake Michigan humidity rolls in, even a few hours without cooling can put children, elderly family members, and pets at serious risk.
Burkhardt Heating, Cooling, Plumbing, Electric has been repairing air conditioners in Milwaukee and southeastern Wisconsin since 1961. Three generations of trusted service have taught us what breaks on the systems installed in Milwaukee's older homes, what parts fail first during August heat waves, and what it takes to get a family comfortable again the same day they call. We are not a national call center dispatching a stranger; we are your neighbors, and we have been since Eisenhower was president.
This page covers everything you need to know if your air conditioner is acting up: how to identify what is wrong, what repairs are likely needed, how to decide whether to repair or replace, and how to reach our dispatch team when you need us fast. If you already know you need service, call CALLTRACKINGPHONE right now.
Signs Your Air Conditioner Needs Repair
Air conditioners rarely fail without warning. Most systems give you signals for days or weeks before a full breakdown. Catching these early before the hottest week of July is the difference between a scheduled repair and a midnight emergency call. Here are the most common symptoms Milwaukee homeowners report.
AC Not Cooling or Blowing Warm Air
f your air conditioner is running but the air coming from your vents is warm or barely cooler than room temperature, several things could be at fault. A dirty or restricted air filter is the most common culprit — it starves the system of airflow and dramatically reduces cooling capacity. Beyond that, warm air often points to low refrigerant from a slow leak, a failing compressor, or a dirty outdoor condenser coil that can no longer shed heat effectively. In Milwaukee's summer humidity, a dirty condenser coil can reduce cooling output by 30% or more.
What to do: Replace your air filter first. If the system still blows warm air after 20–30 minutes of operation with a clean filter, call a technician. Do not add refrigerant yourself — refrigerant handling requires EPA Section 608 certification, and topping off a leaking system without fixing the leak is a short-term fix that damages the compressor
AC Frozen or Icing Over
Ice on the indoor unit, the refrigerant lines, or even the outdoor condenser looks alarming — and it is a sign the system needs attention immediately. A frozen evaporator coil is almost always caused by one of three things: restricted airflow from a clogged filter or closed vents, low refrigerant from a leak, or a malfunctioning blower motor that is not moving enough air across the coil.
The danger: running a frozen system grinds on the compressor. Compressors are the most expensive component in your AC — replacing one often costs more than replacing the whole system. If you see ice forming, turn the system off and switch the fan setting on your thermostat to "on" (not "auto") to circulate air and thaw the coil. Then call Burkhardt at 414-206-3049
AC Making Unusual Noises
Normal central AC operation produces a steady hum and airflow sound. Unusual noises are your syste masking for help:
• Grinding or metal-on-metal scraping: Usually a worn or failing blower motor bearing or belt —requires prompt service before the motor seizes
• Squealing or high-pitched screaming: Can indicate a worn fan belt (on older systems), a failingmotor bearing, or high refrigerant pressure. The high-pressure squeal warrants an immediate shutdownand call.
• Banging or clanking: Often a loose or broken component inside the air handler or outdoor unit. Turnthe system off to prevent secondary damage.
• Buzzing or electrical humming: Can indicate a failing capacitor, a relay issue, or loose wiring — allrequire a licensed technician.
• Clicking at startup: A few clicks when the system starts is normal. Continuous clicking suggests arelay or control board problem.
Do not ignore unusual AC noises. Systems that "still cool" with grinding or squealing are typically daysaway from a full mechanical failure.
AC Leaking Water
Water around your indoor air handler is one of the most common service calls Burkhardt handles inMilwaukee — and it is especially prevalent in summer because of the area's high humidity. Your ACremoves moisture from the air as it cools, and that condensate must drain away through a drain line.Milwaukee's humidity means your system produces significantly more condensate than a system in a drierclimate, which accelerates drain line clogging.
A clogged condensate drain will overflow the drain pan and can cause ceiling or floor water damage if leftunaddressed. Water leaks can also indicate a cracked drain pan, a frozen coil that is thawing, or in rarecases a refrigerant leak causing ice melt. Any water pooling near your AC equipment warrants a same-daycall.
AC Short Cycling or Running Constantly
Your AC should cycle on, run for 15–20 minutes, cool the space, then shut off. Two opposite problemssignal trouble:
Short cycling (turns on and off every few minutes): Often caused by an oversized system, a dirty filter causing the system to overheat, low refrigerant, a failing thermostat, or a defective capacitor. Short cycling puts enormous stress on the compressor.
Running constantly without reaching temperature: Common during extreme heat waves, but if you rproperly-sized system cannot keep up on an 85°F day, suspect low refrigerant, a dirty coil, or ductwork leaks losing conditioned air before it reaches the living space.
Both conditions waste energy and accelerate component wear. If your system has been short cycling formore than a day or running nonstop for more than a few hours without reaching your thermostat setpoint,call for a diagnosis.
AC Won't Turn On
A complete no-start is the most frustrating symptom, but it is often one of the simpler repairs. Before calling, check: (1) your thermostat is set to "cool" and below room temperature, (2) the circuit breaker for the AC unit has not tripped, (3) the emergency shut-off switch near the air handler is in the "on" position. I fall three check out and the system still does not start, the most common causes are a failed capacitor(very common), a failed contactor in the outdoor unit, a thermostat fault, or a blown fuse on the control board. These are all technician-level repairs.
Parts Availability
For older furnaces, replacement parts may be discontinued or difficult to source. When a technician tells you a part has a weeks-long lead time or has to be sourced from specialty suppliers, that's a practical signal: if this one part takes two weeks, what happens when the next one fails?
Common AC Repairs in Milwaukee — What We Fix
Burkhardt's Wisconsin-licensed HVAC technicians are factory-trained on the systems most common in Milwaukee homes. Here are the repairs we perform most frequently, and what each one involves.
Refrigerant Leak Detection and Repair
Refrigerant leaks are among the most important AC repairs to handle correctly — and among the mostmishandled in the industry. The right repair is to find the leak, fix it, and then recharge the system to the manufacturer-specified level. Simply adding refrigerant without finding the leak is like topping off a carwith oil but not fixing the oil leak: you will be right back to square one in a few weeks, with additional compressor wear to show for it.
Burkhardt technicians use electronic leak detectors and UV dye injection to locate leaks precisely.Common leak locations include the evaporator coil (particularly on older systems), the Schrader valve, flare connections, and the copper refrigerant lines. Milwaukee's freeze-thaw cycles acceleratemicro-cracks in coil joints, making leak repairs a common spring-season call.
Important refrigerant context for Milwaukee homeowners: The type of refrigerant your system uses matters significantly for repair decisions. Systems manufactured before approximately 2010 likely useR-22 (commonly called Freon). R-22 is no longer manufactured in the United States, and while some reclaimed supply exists, it is expensive and limited. Systems built between 2010 and 2024 typically useR-410A (Puron). New systems manufactured after January 2025 increasingly use R-454B (PuronAdvance), a lower-global-warming-potential refrigerant now required under EPA regulations. We will tell you exactly which refrigerant your system requires and what repair or replacement makes the most sense given current availability and cost.
Capacitor and Electrical Component Replacement
The capacitor is the single most commonly replaced component in residential AC systems — and in Milwaukee summers, it is the first thing that fails when systems run continuously through heat waves. Capacitors store and release electrical energy to start and run the compressor and fan motors. They degrade over time and fail faster under heat stress.
A bad run capacitor causes the system to draw excessive current, run inefficiently, and eventually seize the motor it is supporting. A bad start capacitor means the compressor or fan motor simply will not start. Both are typically same-day, single-visit repairs when a technician has the correct replacement part on the truck — which Burkhardt's fully-stocked service vehicles are designed to ensure.
Other electrical components we commonly replace include contactors, relays, disconnect fuses, and control boards. These are all diagnostically confirmed before replacement — Burkhardt does not swap parts on a guess.
When Replacement Is the Smarter Investment
Replacement becomes the right call when the furnace is 15 or more years old, when multiple components are failing in the same season, when efficiency has noticeably degraded, or when safety issues —particularly heat exchanger damage — are present. It's also worth considering replacement when a significant repair cost would apply to a unit you'd likely replace in two to three years anyway.
Compressor Diagnosis and Replacement
The compressor is the heart of your AC system and also its most expensive component. It compresses refrigerant gas and drives the refrigeration cycle. Compressor failure usually results from a combination of factors: low refrigerant (causes overheating), liquid refrigerant returning to the compressor (causes physical damage), electrical faults, or simple end-of-life wear.
When a compressor fails, the repair-or-replace calculation becomes critical. A compressor replacement in a system under 10 years old with no other issues can be a sound investment. In a system older than 12years, especially one using R-22 or an early R-410A model, a compressor failure almost always tips the calculation toward replacement. We will give you an honest assessment — not a sales pitch.
Evaporator Coil and Condenser Coil Repair
The evaporator coil (inside, in the air handler) absorbs heat from your home's air. The condenser coil(outside, in the cabinet) releases that heat outdoors. Both can fail through refrigerant leaks, physical damage, or simply becoming too dirty to function effectively.
Dirty condenser coils are one of the most common causes of reduced cooling in Milwaukee summer. When the outdoor unit is surrounded by cottonwood fluff, grass clippings, or debris, airflow through the condenser drops and the system struggles to shed heat. Annual condenser coil cleaning is one of the highest-ROI maintenance tasks a Milwaukee homeowner can perform.
Evaporator coil leaks in older systems — especially those with factory coils over 10 years old — can sometimes be repaired with leak sealant, but more commonly require coil replacement. We will assess the coil's overall condition and refrigerant type before recommending repair versus replacement.
Condensate Drain Line Cleaning
As noted above, clogged condensate drain lines are extraordinarily common in Milwaukee's humid summers. The drain line runs from your indoor air handler to a floor drain or outside. Algae, mold, and debris accumulate inside the line, eventually causing a full blockage.
Burkhardt technicians clean drain lines with compressed nitrogen and, when necessary, wet vacuum suction. We also apply condensate drain tabs as a preventive measure to slow future biological growth. If your system has triggered a safety float switch (shutting the system off to prevent overflow), we will reset it after confirming the drain is clear.
Blower Motor and Fan Repair
The blower motor moves conditioned air through your ductwork and into your living spaces. The condenser fan motor pulls air across the outdoor coil. Both are high-cycle components that wear overtime.
Signs of blower motor problems include weak airflow from vents, the system running but no air moving, unusual noises from the air handler cabinet, or the system overheating and tripping a safety limit. In Milwaukee's older homes, blower motors in aging air handlers sometimes run for 20+ years before failing —but when they do go, the failure is usually abrupt. We stock motors for the most common system configurations to minimize turnaround time.
Thermostat Repair and Replacement
A faulty thermostat can mimic almost any AC symptom: not turning on, running constantly, short cycling, or failing to reach temperature. Before attributing cooling problems to a mechanical failure, Burkhardt technicians always verify thermostat operation, calibration, and wiring as part of the diagnostic process.
Modern smart thermostats — Ecobee, Nest, and Honeywell Home T6/T9 series — add installationcomplexity involving heat pump wiring and C-wire requirements that older Milwaukee homes sometimeslack. We install, wire, and configure smart thermostats correctly, including advising on whether a C-wireadapter is needed for your specific system.
Emergency AC Repair in Milwaukee — Same-Day Service Available
A broken air conditioner during a Milwaukee heat wave is a medical risk, not just a discomfort. The elderly,infants, and people with cardiovascular or respiratory conditions can face serious health consequencesduring extended exposure to indoor temperatures above 85°F. When your AC fails in July or August, everyhour matters.
Burkhardt provides emergency AC repair service throughout our service area. When you call 414-206-3049, you reach our dispatch team — not a national answering service — and we prioritize no-cool calls during peak summer heat.
What the August 2023 Heat Wave Taught Us
During Milwaukee's brutal August 2023 heat wave, demand for AC repair across southeastern Wisconsin surged to levels that overwhelmed smaller HVAC companies. Burkhardt deployed seven service technicians simultaneously across the metro area to meet the call volume. The calls we handled that week reinforced something our three generations of service have always shown: having enough technicians, enough trucks, and enough parts inventory is not a luxury — it is what separates a company that can actually help you from one that books you for three days out.
We maintain a large local parts inventory precisely because heat waves do not wait for supply chain lead times. Capacitors, contactors, blower motors, and common coil assemblies for Carrier, Lennox, and Trane systems are on our trucks or at our warehouse — not on a delivery truck from Cincinnati.
What to Do While You Wait for a Technician
If your AC fails during a heat event and you are waiting for a Burkhardt technician, these steps can helpmanage the situation:
1. Close blinds and curtains on sun-exposed windows to block radiant heat.
2. Move to lower floors — heat rises, and lower levels of your home will stay cooler longer.
3. Turn off heat-generating appliances — ovens, dryers, and even incandescent lights add meaningful heat load.
4. Use fans to create cross-ventilation if outdoor temperatures drop below indoor temperatures(typically after 9 or 10 PM during heat waves).
5. Consider a Milwaukee cooling center if household members are medically vulnerable — the City of Milwaukee operates cooling centers during heat emergencies.
Do not run a window or portable AC in a room with the door closed for an elderly or vulnerable person andthen leave the house. Keep checking on them.
Should I Repair or Replace My Air Conditioner?
This is the question Burkhardt technicians get on nearly every service call involving a system over 10 year sold. It is also the question where we believe honesty matters most. We do not earn more by recommending replacement, and we do not earn more by recommending a repair that will fail again in 18months. Here is how we think about it — and how you should too.
The $5,000 Rule Explained
The $5,000 Rule is the most widely used decision framework in the HVAC industry, and it is the oneBurkhardt technicians use as a starting point. The math is simple:
Age of system (years) × Cost of repair ($) = Decision number
• If the result is under $5,000: Repair is generally the right call.
• If the result is over $5,000: Replacement typically offers better long-term value.
Example: Your system is 12 years old and needs a $350 capacitor and contactor replacement. 12 × $350 =$4,200. Repair it. But if that same 12-year-old system needs a compressor replacement, and thecompressor quote is $900: 12 × $900 = $10,800. That is a clear signal to replace.
The $5,000 Rule is a starting point, not a verdict. Other factors modify the decision.
Signs Repair Is the Right Call
• System is under 8–10 years old and the failure is a single, minor component (capacitor, contactor, drain line, thermostat).
• System is in otherwise good condition — no history of repeat breakdowns, clean coils, original compressor intact.
• The repair is less than half the cost of a comparable new system.
• The system uses R-410A refrigerant, which remains widely available for service.
• The remaining efficiency is acceptable — if the system is a 14 SEER unit originally, it is stillreasonably efficient. If it was a 10 SEER unit from 2003, efficiency gains from replacement may justifythe investment.
Signs Replacement Is the Better Investment
• System is 15+ years old and facing any significant repair. At 15 years, an AC system has consumed the majority of its reliable service life.
• Repeat breakdowns in the same or prior seasons — a system that has needed two or three repairs in18 months is telling you something.
• Compressor failure in a system over 10 years old. Compressor replacement cost in an aging system rarely makes financial sense.
• Refrigerant type matters critically here: If your system uses R-22 (Freon, found in systems manufactured before approximately 2010), a refrigerant leak is almost always a replacement trigger.R-22 is no longer manufactured in the U.S., reclaimed supply is limited and expensive, and the investment in recharging a leaking R-22 system is rarely recovered.
• The system cannot keep up with your home's cooling load during normal summer conditions — an undersized or failing system will never become adequate with repairs.
The Refrigerant Factor: R-22, R-410A, and R-454B
Understanding which refrigerant your system uses is now one of the most important factors in any ACrepair-or-replace decision in Milwaukee. Here is the current landscape:
R-22 (Freon): Fully phased out of U.S. production under EPA regulations. If your system was installedbefore approximately 2010 and has a refrigerant leak, you are facing a repair that requires hard-to-source,expensive reclaimed refrigerant. In most cases, a leaking R-22 system is the most compelling replacementargument a technician can make.
R-410A (Puron): The standard refrigerant in systems installed between approximately 2010 and 2024.R-410A is being phased down under updated EPA AIM Act regulations, with production limits taking effect.New equipment shipped after January 2025 increasingly uses R-454B instead. Importantly, R-410A is notbeing phased out of existing systems — it remains available for service and will continue to be availablefor the foreseeable future. If your R-410A system is in good shape and has a repairable leak, repairing it isstill a reasonable investment.
R-454B (Puron Advance): The new standard refrigerant for systems manufactured in 2025 and beyond.R-454B has a significantly lower global warming potential than R-410A and is classified as A2L (mildlyflammable). New systems are already shipping with R-454B, and Burkhardt's trained, licensed technicianshandle A2L refrigerants safely. If you are replacing an aging system, your new system will almost certainlyuse R-454B — which is not a concern, just a difference to be aware of.
No competitor in Milwaukee covers the refrigerant transition with this level of clarity. We think Milwaukeehomeowners deserve to understand what is in their systems and why it matters for their repair andreplacement decisions
We Repair All Major AC Brands in Milwaukee
Burkhardt's Wisconsin-licensed HVAC technicians repair every major residential air conditioning brand. Asan authorized service provider for Carrier, Lennox, and Trane, we have factory-specific training and access to OEM (original equipment manufacturer) parts for these three brands — which means faster repairs, correct components, and no warranty complications from aftermarket substitutions.
Carrier AC Repair Milwaukee
Carrier air conditioners are among the most common systems in Milwaukee, and Burkhardt has been servicing and repairing them for decades. Common Carrier repair issues include capacitor failures in the Comfort and Performance series outdoor units, TXV (thermostatic expansion valve) problems in higher-efficiency models, and Green speed inverter compressor diagnostics in the top-tier Infinity series. Carrier's Infinity systems communicate through a proprietary controls platform — diagnosis requires the correct Carrier software tools, which Burkhardt technicians carry.
If your Carrier system is at end-of-life and replacement makes more sense than repair, Burkhardt installs Armstrong and Concord systems — quality alternatives we'll show you during your in-home assessment.
Lennox AC Repair Milwaukee
Lennox builds some of the highest-efficiency systems available — the XC25 and XC21 variable-capacity units achieve SEER2 ratings well above standard equipment. Burkhardt has access to Lennox factory training, Lennox OEM parts, and Lennox technical support lines that independent shops do not. Common Lennox repair issues include iComfort thermostat communication faults, SunSource energy module issues on solar-ready systems, and blower motor failures in Dave Lennox Signature series air handlers. Lennox's10-year parts warranty on registered equipment is an advantage Burkhardt helps homeowners use correctly — including verifying proper registration on your existing system.
If your Lennox system is at end-of-life and replacement makes more sense than repair, Burkhardt installsArmstrong and Concord systems — quality alternatives we'll show you during your in-home assessment.
Trane AC Repair Milwaukee
Trane's reputation for durability is earned — "It's Hard to Stop a Trane" is not empty marketing. TraneXV20i and XV18 variable-speed systems are common in newer Milwaukee-area construction and major replacements, and they deliver exceptional comfort. Trane repair calls we handle frequently include Comfort Link II thermostat communication faults, condenser fan motor failures (which Trane addresses with multi-speed EC motors in current lines), and refrigerant circuit issues in older XL-series equipment. Burkhardt's factory training on Trane equipment ensures our technicians understand Trane's specific wiring and control sequences.
If your Trane system is at end-of-life and replacement makes more sense than repair, Burkhardt installsArmstrong and Concord systems — quality alternatives we'll show you during your in-home assessment.
Goodman, Rheem, and Other Brands
Burkhardt repairs all residential AC brands, including Goodman, Rheem, American Standard, Bryant, York, Amana, Heil, and others. While we are not factory-authorized dealers for all of these, our technicians carry the diagnostic tools and part sourcing relationships to service them effectively. Goodman and Rheem are particularly common in budget-focused installations across Milwaukee's rental housing stock. American Standard, Bryant (Carrier's sibling brand), and York are frequent in homes built between 1985 and 2010.
AC Repair Across Milwaukee and Southeastern Wisconsin
Burkhardt Heating, Cooling, Plumbing & Electric serves homeowners and businesses throughout afour-county service area in southeastern Wisconsin. If your home is in any of these communities, we cantypically dispatch a technician the same day for urgent cooling calls.
Milwaukee County, Waukesha County, Ozaukee County, Washington County
Why Milwaukee Summers Are Hard on Air Conditioners
Milwaukee's climate creates AC conditions that are genuinely more demanding than most of the country appreciates. Understanding why helps explain why preventive maintenance matters so much here — and why heat wave breakdowns are not random bad luck.
Heat days are increasing. Wisconsin residents now need air conditioning an average of 70 days per year, up from 65 days in 1981–2000, and that number is projected to reach 83 days per year by 2060. More cooling days mean more compressor cycles, more run hours, and faster component wear. Your AC system is working harder every decade than it did when it was installed.
The August 2023 heat wave was a turning point. Milwaukee set records during the August 2023 heat event, and the demand for AC repair across southeastern Wisconsin reached crisis levels. Burkhardt dispatched seven technicians simultaneously across the service area — the largest single-event deployment in recent memory. The heat waves are not a one-time event. They are becoming the new baseline.
Lake Michigan humidity amplifies the stress. Milwaukee's proximity to Lake Michigan creates elevated relative humidity throughout summer, particularly during south-wind events when warm Gulf moisture pushes north. High humidity forces your AC to work harder removing moisture from the air — a process that stresses the compressor and saturates the evaporator coil with more condensate than drier climates produce. The result: faster condensate drain clogging, higher evaporator coil icing risk, and increased mold growth inside air handlers. These are Milwaukee-specific failure patterns that technicians experienced in other climates may miss.
Milwaukee's housing stock adds complexity. The city's characteristic pre-war and postwar housing —brick two-flats, Cape Cods, colonials, and bungalows built largely before 1960 — was not designed for central air conditioning. Ductwork was retrofitted into spaces not designed for it, creating undersized supply and return paths, poor attic insulation, and limited clearance for refrigerant line sets. Burkhardt's 65years of working inside these homes means our technicians know the configurations, the workarounds, and the failure points in Milwaukee's specific housing stock in a way that a franchised national company dispatching from a generic truck simply cannot match.
Older systems and new refrigerant standards are colliding. As described in the repair-or-replace section above, the R-22 phase-out and the R-410A phase-down are creating pressure on older Milwaukee systems that is new and distinct from typical wear-and-tear. If your system was installed more than 12–15years ago, the refrigerant question is no longer academic — it is a live factor in your next repair decision.
AC Repair vs. Ongoing Maintenance — What Is the Difference?
AC repair and AC maintenance are related but distinct services, and understanding the difference helpsyou protect your equipment and avoid paying for emergency repairs that preventive maintenance wouldhave caught.
AC repair addresses a specific failure: a broken component, a refrigerant leak, a frozen coil, a failed motor. It restores a system that is not working correctly to working condition. Most AC repairs are reactive —something broke, and a technician fixes it.
AC maintenance (also called a tune-up or precision tune-up) is a scheduled inspection and service visit designed to catch problems before they become failures. A Burkhardt AC tune-up typically include scleaning the condenser coil, checking refrigerant pressure, testing capacitors and contactors, clearing the condensate drain, inspecting electrical connections, lubricating moving parts, and verifying system performance across the full operating range. Tune-ups performed in April or May — before peak cooling season — consistently reduce emergency repair calls because they catch the components that were about to fail.
The economics are compelling: A tune-up catches a failing capacitor during a scheduled visit. That same capacitor failing on a Saturday in August means an emergency service call with after-hours rates, potential compressor damage from running on a dying capacitor, and a family that spent the night uncomfortable. The capacitor itself is the same cost either way. The circumstances are not.
Burkhardt offers maintenance agreements for Milwaukee homeowners who want guaranteed annualservice, priority scheduling during peak season, and discounts on repairs if something is found during themaintenance visit.
Schedule Your Furnace Replacement Assessment
How quickly can Burkhardt respond to an AC repair call in Milwaukee?
Burkhardt dispatches technicians throughout Milwaukee County, Waukesha County, Ozaukee County, and Washington County, with same-day service available for urgent no-cool calls. During summer heat waves, we prioritize calls involving complete cooling failures to restore comfort as quickly as possible. Call 414-206-3049 to reach our dispatch team and get an estimated arrival window.
Does Burkhardt offer emergency AC repair?
Yes. Burkhardt Heating, Cooling, Plumbing & Electric provides emergency AC repair service for Milwaukee-area homeowners when a system fails during extreme heat. As a family-owned company serving the area since 1961, we understand that a broken air conditioner during a Wisconsin summer is a genuine emergency.
Why is my air conditioner running but not cooling?
The most common causes are a dirty or clogged air filter restricting airflow, low refrigerant from a leak, a frozen evaporator coil, a failing compressor, or a dirty outdoor condenser coil. Replacing your air filter is the one homeowner-level fix to try first. If the system still blows warm air after 30 minutes with a fresh filter, call a licensed technician — the remaining causes all require professional diagnosis and repair.
What causes an AC to freeze up and ice over?
A frozen AC coil is almost always caused by restricted airflow (dirty filter, closed or blocked vents), low refrigerant from a leak, or a malfunctioning blower motor that is not moving enough air across the evaporator coil. Running a frozen system risks compressor damage. Turn the system off, switch the fan to "on" to thaw the coil, and call a technician before restarting.
Why does my AC make a grinding or squealing noise?
Grinding or metal scraping typically indicates a worn blower motor bearing or a loose component in the air handler or outdoor unit. Squealing can indicate a worn fan belt on older systems or high refrigerant pressure. Both warrant immediate attention — continued operation accelerates the damage and can turn a motor bearing replacement into a full motor replacement.
Why is my AC leaking water inside my house?
Water near your indoor air handler almost always indicates a clogged condensate drain line. Your A Cremoves humidity from the air as it cools, and in Milwaukee's humid summers, it produces significant condensate volume. Algae and debris clog the drain line, causing the drain pan to overflow. A technician can clear the line quickly. Do not ignore it — overflow water can cause ceiling and floor damage.
Should I repair or replace my air conditioner?
Use the $5,000 Rule: multiply the system's age in years by the repair cost in dollars. If the result exceeds $5,000, replacement typically offers better long-term value. A 12-year-old system needing a $500 repair($6,000) leans toward replacement; a 5-year-old system with the same repair ($2,500) is worth fixing. The refrigerant type — especially R-22 systems — can accelerate this decision toward replacement.
What is the $5,000 Rule for AC replacement?
The $5,000 Rule is the HVAC industry's standard decision framework: system age (years) × repair cost ($). Results under $5,000 typically favor repair; results over $5,000 typically favor replacement. Example: a15-year-old system needing a $400 repair = $6,000 — lean toward replacement. A 4-year-old system with the same repair = $1,600 — repair it. Other factors, including refrigerant type and break down frequency, refine the decision.
What brands of AC does Burkhardt repair?
Burkhardt repairs all major residential air conditioning brands: Carrier, Lennox, Trane, Bryant, York, Goodman, Rheem, American Standard, Amana, Heil, and others. As an authorized service provider for Carrier, Lennox, and Trane, we have factory training and OEM parts access for these three brands specifically, ensuring faster repairs and warranty-compliant service.
Can you repair an AC system that uses R-22 refrigerant?
R-22 (commonly called Freon) is no longer manufactured in the United States. While some reclaimed R-22is available for service of existing systems, supply is limited and costs are high. In most cases, a system old enough to use R-22 and significant enough to need a refrigerant recharge is a stronger candidate for replacement than repair. We will assess your specific situation honestly.
What is R-410A and is it being phased out?
R-410A (Puron) is the refrigerant used in most AC systems manufactured between approximately 2010and 2024. It is now being phased down under EPA AIM Act regulations — new equipment manufactured after January 2025 increasingly uses R-454B (Puron Advance) instead. Critically, R-410A is not being phased out of existing systems. It remains available for service and repairs, and Milwaukee home owners with R-410A systems should not feel pressure to replace a functioning system solely because of the refrigerant transition.
How long does a central air conditioner last in Wisconsin?
A well-maintained central AC system in Wisconsin typically lasts 12–18 years. Milwaukee's humidity, seasonal temperature swings, and increasingly long summer run times put above-average stress on compressors and coils compared to drier climates. Systems that receive annual tune-ups and prompt repairs consistently reach the upper end of that range; neglected systems often fail before the 12-yearmark.
When is the best time to schedule AC service in Milwaukee?
The ideal window is April through mid-May, before peak summer demand. Pre-season tune-ups catch components that are about to fail before they actually fail — typically during a heat wave when you cannot afford downtime and scheduling is most difficult. If your system is showing symptoms right now —weak cooling, unusual noises, water leaks — call immediately regardless of season.
Why does my AC struggle more during Milwaukee heat waves?
Extended periods above 85°F force AC systems to run nearly continuously, stressing compressors and refrigerant circuits. Milwaukee's Lake Michigan humidity compounds this: elevated moisture causes faster condensate drain clogging, higher evaporator coil icing risk, and harder overall system work. Systems performing adequately under normal conditions often fail completely during multi-day heat events because the cumulative stress exceeds design margins.
Ready to Schedule Your AC Repair?