Scratching in the Walls and Flickering Lights?

Certified Master Electricians

Hi, I am Peter, the Master Electrician at PRO Electric plus HVAC. This is one nobody connects to their wiring until I point it out. You hear scratching or scurrying in the walls or attic, and around the same time the lights start flickering or a breaker keeps tripping. Those two things together are worth paying attention to, because mice, rats, and squirrels chew on wiring, and chewed wiring is a fire risk. Let me explain what to look and listen for.

Rodents gnaw constantly, and the plastic insulation on electrical wires is an easy target. Once they strip that insulation, you have bare wire inside your walls, which can short out, arc, and start a fire. The electrical symptoms often show up alongside the sounds, which is the connection most people miss.

Signs rodents may be in your wiring

Why an electrician and a pest pro both matter

This is a two part problem. A pest control professional deals with the animals and how they are getting in, which is essential so the chewing stops. But the damage they already did to your wiring is an electrical repair, and that is our part. Getting rid of the mice does not fix the bare wire they left behind, so both pieces need to happen.

How we help

We inspect the wiring for rodent damage, find the chewed runs, and repair or replace the affected wiring so there is no bare conductor left in the walls. If the damage is widespread, it can be part of a larger pattern of an aging or failing electrical system. We handle wiring inspection and repair across Northern Virginia, and recommend pairing it with a pest professional.

Frequently asked questions

Can mice or rats chewing wires cause flickering lights?

Yes. Rodents gnaw on wire insulation, and once they expose or damage a wire, the circuit can cut in and out, which shows up as flickering lights, intermittent outlets, or a breaker that keeps tripping. Hearing scratching in the walls along with these electrical symptoms is a strong sign.

Is rodent damage to wiring a fire hazard?

Yes, a serious one. When a rodent chews through the insulation, the bare wire can short against other wires or metal, arc, and ignite the wood and insulation inside the wall where you cannot see it. Chewed wiring is one of the more common hidden causes of house fires.

How do I know if rodents are chewing my wires?

Listen for scratching or scurrying in walls, ceilings, or the attic, especially alongside flickering lights, intermittent outlets, or tripping breakers. Look for droppings near outlets or in the attic and basement, gnaw marks on cables, and any faint burning or hot insulation smell.

Do I need an electrician or an exterminator for rodents in the wiring?

Both. A pest professional removes the animals and seals how they got in, so the chewing stops. An electrician repairs or replaces the wiring they already damaged, since getting rid of the rodents does not fix the bare wire left behind. The two jobs are separate and both matter.

What should I do if I think rodents damaged my wiring?

Have the wiring inspected by an electrician, and if there is any burning smell, flickering, or tripping, treat it as urgent and turn off the affected circuit at the breaker if you safely can. Pair the electrical repair with a pest control professional so the problem does not come back.