An oven fan that keeps running after you turn the oven off is usually the cooling fan, which many ovens run to protect the controls and surrounding cabinets until the inside cools down. It's a concern only if the fan runs when the oven is already cold, never stops, or makes grinding or squealing noises.
Quick diagnosis
| Symptom | Likely cause | First thing to try |
|---|---|---|
| Fan runs after cooking, then stops on its own | Normal cooling fan | Let it finish |
| Fan runs long after self-clean | Normal; the oven is extremely hot | Wait for it to cool |
| Fan running with the oven cold | Stuck relay, failed sensor or control fault | Switch off the breaker for a minute, then restore power |
| Grinding or squealing fan | Worn motor or debris in the fan | Stop using the oven and call |
| Convection fan stops when the door opens | Normal on many models | Close the door; it should resume |
| Controls or knobs very hot to the touch | Cooling fan not running | Stop using the oven until it's checked |
A closer look
What the cooling fan does
Behind the control panel, and often above the oven cavity, a fan pushes air across the electronics and out through vents near the door or top. It's controlled by temperature, not a timer, so it runs until the area cools below a set point. How long that takes depends on how hot and how long the oven ran, and after self-clean it can be quite a while.
Cooling fan or convection fan
They're two different fans. The convection fan sits at the back of the oven cavity and moves hot air around the food during convection cooking. Many convection fans stop when the door opens and start again when it closes. The cooling fan lives outside the cavity and has nothing to do with cooking.
When the fan won't stop
If the fan runs with the oven stone cold, the control may have a relay stuck closed, or the temperature sensor that tells the fan to stop may have failed. Cutting power at the breaker for a minute sometimes clears it. Many wall ovens are hard-wired, so the breaker is the only safe way to cut power.
Noisy fans
A fan that starts to grind, squeal or rattle has a worn motor or something caught in the blades. Running it that way usually ends with a failed fan.
Who runs into this most
Owners of wall ovens and double ovens, newer ranges with electronic controls, and anyone who has just run a self-clean cycle.
Prevention checklist
- •Keep the vents near the oven door and cooktop clear
- •Don't drape towels over the control panel
- •Let the fan finish after self-clean instead of cutting power
- •Note new noises early
Time to call a pro
- •The fan runs constantly with the oven cold
- •The fan is loud, grinding or squealing
- •The control panel or knobs get very hot
- •The convection fan doesn't run in convection mode with the door closed
Travis's rule of thumb: A fan that runs after cooking is protecting your oven. A fan that runs when the oven's cold is asking for help.
A gap at the door also lets heat reach the controls, so check why an oven door won't close properly. For a fan that won't quit with the oven cold, see our oven repair page or call (832) 552-1615.