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Breaker keeps tripping

A breaker trips to protect the wiring. One that trips repeatedly — or lights that dim and flicker across half the house — is telling you something is wrong, not asking to be reset again.

By the Wolfpack Home Services editorial team · Reviewed · How we research

How urgent is it? Burning smells, sparks, heat at an outlet or panel, or buzzing are emergencies; a single circuit that trips under an obvious overload is not.

Do this now

  1. If you see sparks, smell burning or feel a hot outlet, switch or panel, turn off the main breaker if you can do it safely and call 911.
  2. Otherwise, unplug or switch off everything on the affected circuit.
  3. Reset the breaker once: push it fully to off, then on.
  4. Plug things back in one at a time to find the item or combination that trips it.
  5. If it trips again with nothing connected, or will not reset, leave it off and call an electrician.
  6. If part of the house has lost power or lights surge bright and dim, call your electric utility — the problem may be in the service line.

What usually causes it

  • Too many high-draw appliances on one circuit
  • A short circuit or ground fault in an appliance, cord, outlet or wiring
  • A worn or failing breaker
  • A loose connection at the panel or in the utility service
  • A GFCI or AFCI breaker responding to a real fault

What a professional will do

An electrician works out whether the cause is overload, a fault or the breaker itself, and tests the circuit and its connections. The fix may be a dedicated circuit for a large appliance, repair of damaged wiring, or replacing a breaker or an obsolete panel. Permitted work is inspected before it is put back in service.

How to prevent it

  • Spread space heaters, hair dryers and similar loads across different circuits
  • Never replace a breaker with a larger one to stop it tripping
  • Have two-prong outlets, aluminum wiring and fuse panels assessed
  • Label the panel so you know what each breaker controls

Rules and paperwork in Pennsylvania

  • Pennsylvania’s Home Improvement Consumer Protection Act requires most contractors who perform home improvements to register with the Attorney General’s office and to give you a written contract for any job over $500. The registration number belongs on the estimate and the contract — ask for it.
  • Building permits in Pennsylvania are issued under the Uniform Construction Code by each municipality or the inspection agency it appoints, so the local building or codes office decides what needs a permit and an inspection.
  • Permitted electrical work is inspected by the municipality or an approved third-party electrical inspection agency before it is covered up or energized.
  • Pennsylvania does not issue a statewide license for this trade. Some municipalities register or license it locally, which is one reason to confirm requirements with your own municipality.

Sources: Pennsylvania Office of Attorney General — Home Improvement Consumer Protection Act; Pennsylvania Department of Labor & Industry — Uniform Construction Code; Pennsylvania Department of Labor & Industry — Uniform Construction Code; Pennsylvania Department of Labor & Industry. Rules change — confirm current requirements with the agency and with your municipality.

Frequently asked questions

Can I just keep resetting it?

No. Repeated tripping means the breaker is detecting overload or a fault. Resetting it over and over heats the wiring it is trying to protect.

Why did half my house lose power?

Losing roughly half the circuits, or lights that brighten and dim together, often indicates a lost leg or a loose neutral in the service. Call the utility first — it can be dangerous.

Do I need a bigger panel?

Not necessarily. Tripping on one circuit is usually solved at that circuit. A panel upgrade is the answer when the whole service is short of capacity.

Go deeper

Our full electrical guide covers how the work is done, what affects the price, and what to ask before you hire, and there is more on panel upgrades.

Electrical help by town

This guide is general information, not a substitute for a professional assessing your home. If you are unsure whether something is safe, treat it as if it is not.