Why Does My Breaker Keep Tripping?
You hit reset on the breaker, the power comes back, and an hour later it trips again. That breaker is not broken. It is doing its job, telling you that something on that circuit is wrong.
A breaker that trips again and again is a warning sign. Here are the common causes, what each one means, and when to stop resetting and call an electrician.
What a Tripping Breaker Actually Means
A breaker is a safety switch. When the current on a circuit goes higher than the breaker can safely allow, it opens to stop the flow. That protects the wires from overheating and starting a fire. The breaker tripping is the system working.
The question is why the current went too high. There are four common causes.
1. Overloaded Circuit
This is the most common cause. Too many devices on one circuit draw more current than it can safely handle. A space heater, a hair dryer, and a microwave all on the same circuit will push it past the limit.
The fix is simple. Move some devices to another circuit. If you cannot, the panel may not have enough capacity, and our guide on outlets per circuit shows the safe limits.
2. Short Circuit
A short circuit is when a hot wire touches a neutral wire or a ground wire. Current spikes hard and fast, and the breaker trips right away. The cord on an old lamp or a damaged appliance is the usual cause.
Test by unplugging things on the circuit one at a time and resetting. If the breaker holds with one device unplugged, that device is the problem.
3. Ground Fault
A ground fault is similar to a short circuit but involves current escaping to ground. This is what GFCI outlets in bathrooms and kitchens protect against. Moisture, a damaged appliance, or a worn wire can cause it.
If a GFCI trips, push the reset button. If it trips again, do not keep resetting. Have it inspected.
4. Failing Breaker
Breakers do not last forever. After 25 to 40 years, they wear out. A breaker that trips with light load may be at the end of its life. Our circuit breaker replacement service handles this.
If your panel is also old, see our guide on signs you need a panel upgrade.
When to Stop Resetting and Call
Reset once. If the breaker trips again right away, stop. Each reset of a failing breaker or a real short circuit lets heat build up at the fault. Heat is how electrical fires start.
The Electrical Safety Authority links 143 electrical related fatalities in Ontario between 2015 and 2024, and its 2024 Ontario Electrical Safety Report found that electrical fatalities outside of work rose 40 percent over the past decade.
Patience Cathcart, the ESA Public Safety Officer, said the findings show why safety has to reach beyond job sites, and that the agency stays focused on "educating the public, guiding industry."
If you smell anything burning near the panel or an outlet, do not reset. Read our guide on an electrical burning smell for the safe steps.
Why You Need a Licensed Electrician
Diagnosing a tripping breaker means testing the circuit, the wiring, and the breaker itself. In Ontario, the ESA states that a Licensed Electrical Contractor is the only business you can legally hire to do this. We diagnose tripping breakers through our residential electrical services.
Tripping Breaker FAQ
Is a tripping breaker dangerous?
The trip itself is the safety system doing its job. The danger is whatever made it trip. If a breaker keeps tripping, the cause needs to be found and fixed.
How many times should I reset a tripped breaker?
Once. If it trips again, stop and call an electrician. Repeated resets of a failing breaker or a real fault let heat build up at the problem.
Can a tripping breaker cause a fire?
The trip prevents a fire. Resetting a breaker that should not be reset can. A loose connection or a failing breaker run hot, and heat is how electrical fires start.
How do I find what is overloading my circuit?
Unplug the devices on the circuit, reset the breaker, then plug them back in one at a time. Watch which one trips it. That is the load that is too much.
How much does it cost to replace a breaker?
A single residential breaker replacement runs in the low hundreds of dollars in most cases, plus the service call. An electrician confirms by inspecting the panel.
The Bottom Line
A breaker that keeps tripping is telling you something. The cause is usually an overload, a short, a ground fault, or a worn breaker. Reset once, find the cause, and stop resetting if the trip repeats. A licensed electrician confirms the cause and makes the fix safe.
Breaker keeps tripping?
Kolji Bros. Electrical diagnoses and fixes tripping breakers for homes across the GTA. Call 1 866 565 5427 or book online.