Mice move indoors as the weather cools, and the warm, insulated spaces in stoves, dishwashers, fridges and dryers suit them well. A handful of checks will confirm whether they've gotten into an appliance and whether they've chewed anything that affects safety.
Safety first: Unplug the appliance or switch off its breaker before you look inside, wear gloves, and don't sweep or vacuum droppings; follow CDC guidance and soak them with disinfectant before wiping them up.
Follow the diagnostic path
Step 1: Do you smell something sharp or foul during the first few minutes the oven heats?
If yes: Nesting material or urine in the oven's insulation or storage drawer is a common source. Turn the oven off, let it cool and pull out the drawer. If the smell continues after cleaning the drawer, the insulation behind the panels may need attention from a technician.
If no: Go to Step 2.
Step 2: Are there droppings in the stove drawer, under the fridge or behind the dishwasher kick plate?
If yes: That confirms activity. With power off, remove the kick plate on the dishwasher or fridge (usually a few screws or clips) and look at insulation and wiring.
If no: Go to Step 3.
Step 3: Has an appliance started acting up at the same time, such as a dead burner, control errors or a noisy fridge fan?
If yes: Chewed wiring is possible. Stop using the appliance and leave it unplugged. Don't restore power to anything with damaged wires; a technician needs to inspect and repair it.
If no: Go to Step 4.
Step 4: Does the outside dryer vent flap close fully?
If yes: Go to Step 5.
If no: A flap that hangs open is an easy way in. Replace the hood, but don't cover a dryer vent with fine screen; lint clogs it quickly and blocks airflow.
Step 5: Have you found where they're getting into the house?
If yes: Seal those gaps, often around pipes, gas lines and vent penetrations, or have pest control do it.
If no: A pest control company can find entry points; cleaning the appliance alone won't stop them coming back.
What your answer points to
| What you found | Most likely cause | DIY or technician |
|---|---|---|
| Smell when the oven heats | Nest or urine in drawer or insulation | DIY drawer cleanup; technician for insulation |
| Droppings behind kick plate | Active mice | DIY cleanup with gloves and disinfectant |
| New electrical faults | Chewed wiring | Technician |
| Vent flap stuck open | Entry through dryer vent | DIY hood replacement |
| No idea how they get in | Unsealed entry points | Pest control |
Stop and call a technician if
- •You see chewed or bare wires anywhere on an appliance.
- •A breaker trips or you smell burning plastic.
- •Nesting material is packed around a fan motor or inside the oven body.
Keep it from coming back
- •Check the stove drawer and behind kick plates each fall.
- •Keep crumbs and pet food away from the base of appliances.
- •Inspect the dryer vent flap a few times a year.
- •Closing a seasonal house? Our start-up and shutdown checks include a pest walk-through.
Owen's shop tip: The storage drawer under the oven is the first place I look. Mice like it because it's dark, sheltered and warm whenever someone cooks.
If you find chewed wiring or a nest you can't reach, call ProFix Boston at (617) 812-1425, or see our stove repair service.