AC Repair in Grafton, WI

Grafton sits at the heart of Ozaukee County, centered on the Milwaukee River — a location that has shaped the village from its earliest days as a lime kiln and flour mill town in the 1840s through its emergence as a commuter community along I-43 today. Washington Street and Bridge Street carry the character of a genuine small-town center, while newer residential developments around Grafton High School and along N. Wisconsin Avenue reflect the suburban growth of recent decades.

This mix of old and new creates a broad range of AC service needs. In Grafton's older neighborhoods near Washington Street and the Milwaukee River, homes from the 1950s and 1960s frequently have central AC that was retrofitted into heating-only ductwork — common problems include undersized return air paths, ductwork running through uninsulated crawlspaces or attic spaces, and equipment that was sized without accounting for the home's actual cooling load. These systems often cool the home partially but struggle with back rooms, upper floors, or south-facing spaces on the hottest days of the year.

Near the Aurora Health Care Grafton campus and along N. Wisconsin Avenue, 1980s and 1990s construction is more common. Systems from this era are now reaching the end of their reliable service life, and capacitor failures, refrigerant leaks, and failing condenser fan motors are routine repair calls. Ozaukee County's hard groundwater also affects AC condensate drain systems — calcium and mineral deposits accumulate in drain lines and eventually trigger safety shutoffs if not cleared regularly through annual maintenance.

Burkhardt Heating, Cooling, Plumbing & Electric has been serving Ozaukee County for over 60 years. Our NATE-certified technicians know every housing era in Grafton and service all major AC brands — Carrier, Lennox, Trane, Ruud, Goodman, Bryant, and others. 24/7 emergency AC repair. GreenSky financing for replacements. Call 414-206-3049.

Thermostat and Controls

If your AC isn't cooling properly, the issue may be your thermostat rather than the unit itself. We diagnose and repair all thermostat types — programmable, smart (Nest, Ecobee, Honeywell), and standard models. Incorrect thermostat settings, dead batteries, faulty wiring, or a thermostat placed in direct sunlight can all cause cooling problems. We'll pinpoint the issue and get your system running right.

My Grafton home near the Milwaukee River area has AC that runs constantly but doesn't cool the upstairs. Why?

Continuous running without adequate cooling often points to refrigerant loss, a dirty evaporator or condenser coil, or ductwork issues limiting airflow to upper floors. In Grafton's older homes with retrofitted systems, duct sizing is frequently the root cause. Burkhardt can perform a full system diagnostic to identify what's limiting performance.

How does Ozaukee County hard water affect my AC system in Grafton?

Hard water causes calcium and mineral deposits to build up in condensate drain lines and pans, eventually causing backups that trigger the float switch and shut the system down. Annual maintenance with drain line cleaning prevents this. Burkhardt can also apply drain treatments to slow buildup between service visits.

What is involved in an AC repair visit from Burkhardt?

Our technician will diagnose the issue, explain the findings, and provide a clear repair estimate before starting any work. For common repairs — capacitors, contactors, refrigerant, drain lines — we carry parts on the truck and complete the job in one visit. We always prioritize getting your home cool again as quickly as possible.

Related Services

• All Services in Grafton
• AC Installation in Grafton
• AC Maintenance in Grafton

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