Why Does My Circuit Breaker Keep Tripping? Causes and Fixes
A circuit breaker that trips once is doing its job. A breaker that trips repeatedly — especially when you reset it — is telling you something important: there is a fault in the circuit that needs to be found and corrected. Ignoring a repeatedly tripping breaker and resetting it over and over is dangerous and can lead to electrical fires, equipment damage, or personal injury. This guide explains the most common causes of a tripping circuit breaker and what you should do about each one.
How Circuit Breakers Work
A circuit breaker is a protective switch designed to open (trip) when the current flowing through it exceeds a safe level. This protects the wiring in your walls from overheating and igniting. Breakers trip for three main reasons: circuit overload, short circuit, or ground fault. Each cause has different symptoms and solutions.
Common Causes of a Tripping Circuit Breaker
| Cause | What It Means | What to Do |
|---|---|---|
| Circuit overload | Too many devices drawing current on one circuit | Reduce load; redistribute to other circuits |
| Short circuit | Hot wire contacts neutral wire — high current surge | Electrician required immediately |
| Ground fault | Hot wire contacts ground wire or grounded surface | Electrician or GFCI reset; diagnose source |
| Worn/weak breaker | Old breaker trips at lower amperage than rated | Electrician to replace breaker |
| HVAC hard start fault | AC or furnace motor drawing high startup current | HVAC technician to add hard-start kit or repair motor |
| Arc fault | Damaged wire arcing inside wall or device | Electrician required — AFCI fault |
| Faulty appliance | Defective device causing excess current draw | Unplug device; have it repaired or replaced |
Circuit Overload: The Most Common Cause
An overloaded circuit occurs when the total electrical load connected to a circuit exceeds its amperage rating — typically 15 or 20 amps for household circuits. Common scenarios include: running a space heater, hair dryer, and microwave on the same circuit simultaneously, or an older home with circuits that served only a few outlets now powering modern high-draw devices.
To test for overload: reset the breaker, then turn off or unplug most devices on that circuit. If the breaker holds, you've identified an overload. Redistribute loads to other circuits or have an electrician add a dedicated circuit for high-draw devices.
Short Circuit and Ground Fault
A short circuit causes an immediate, often loud trip — sometimes with a burning smell or a flash. It occurs when a hot wire (black) makes contact with a neutral wire (white), creating a low-resistance path that allows current to surge far beyond safe levels. Causes include damaged wiring insulation, loose connections at outlets or fixtures, or a faulty appliance plugged into the circuit.
A ground fault is similar but involves a hot wire contacting a grounded surface — common near water (bathrooms, kitchens, outdoor outlets). GFCI (ground fault circuit interrupter) outlets and breakers are designed to detect these faults and trip quickly enough to prevent shock. If a GFCI outlet has tripped, look for the TEST and RESET buttons on the outlet face and press RESET. If it trips again immediately, there is a ground fault device or wiring fault on that circuit.
HVAC-Specific Tripping: Air Conditioners and Furnaces
One of the most common calls Burkhardt receives in summer is "my AC keeps tripping the breaker." Air conditioners draw very high startup current (called locked-rotor amps) when the compressor starts. As capacitors age and weaken, this startup current increases, eventually tripping the breaker. A failing compressor can also draw excessive current continuously during operation.
If your AC or heat pump is tripping a 30, 40, or 50-amp dedicated breaker repeatedly, do not keep resetting it. Call an HVAC technician to test the capacitor and compressor before the next attempt. Running a compressor with a weak capacitor accelerates compressor wear significantly.
When a Breaker Is Worn Out
Breakers are mechanical devices with a finite lifespan — typically 25-40 years. An older breaker may begin tripping at amperage levels well below its rated capacity. If a circuit trips under a normal load that it handled fine for years, the breaker itself may be the issue. A licensed electrician can test the breaker and replace it if needed — typically a straightforward, low-cost repair.
When to Call a Professional
Call a licensed electrician immediately if: the breaker trips instantly when reset (short circuit or major ground fault), you smell burning from the panel or outlet, a breaker feels hot to the touch, or you see scorch marks around outlets or the panel. These are active electrical hazards, not inconveniences.
Call an HVAC technician if: the tripping breaker is dedicated to your furnace, air conditioner, or heat pump. HVAC equipment draws high and complex electrical loads that require HVAC-specific testing beyond what a general electrician typically performs.
Burkhardt Heating, Cooling, Plumbing & Electric provides both HVAC and electrical services throughout Southeastern Wisconsin. Our licensed electricians and NATE-certified HVAC technicians can diagnose electrical faults in your home's systems, from the panel to the equipment.
Electrical Service in Southeastern Wisconsin
A repeatedly tripping breaker is never "normal" — it is a symptom of a real problem that, if ignored, creates serious risk. Call Burkhardt to have the cause identified and corrected safely.
If you see any of these codes, call Burkhardt at 414-206-3049. Our NATE-certified technicians can diagnose and repair the issue — usually in a single visit.
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