Symptoms
- Grinding, whirring, or rattling sound during convection cooking
- Noise increases over time or with use
- Fan sounds different than it used to
- Noise present even when the oven isn't actively heating, if fan runs independently
Likely causes
- CommonWorn convection fan motor bearingLike any motor, the bearing can wear out after years of use, causing grinding or whining noise.
- CommonGrease or food debris built up on the fan bladeBaked-on residue can unbalance the blade or cause it to catch slightly as it spins.
- PossibleLoose fan blade on the motor shaftA blade that's worked loose can wobble and create noise or even contact the housing.
- PossibleForeign object or debris caught in the fan housingA dropped item or large debris can rattle against the spinning blade.
- PossibleFailing convection fan motor overallThe motor itself can be nearing full failure, with noise as an early warning sign.
What to do
- Turn off and unplug the oven, or shut off the breaker, before inspecting the fan.
- Locate the convection fan, usually at the back of the oven cavity behind a cover.
- Once cool, remove the cover per your model's instructions and inspect the fan blade for grease buildup or looseness.
- Clean the blade and surrounding area of any baked-on residue with a damp cloth.
- Check that the blade is securely attached to the motor shaft and not wobbling.
- Spin the blade by hand to feel for resistance or grinding, which points to a bearing issue in the motor.
- Have a technician replace the convection fan motor if cleaning doesn't resolve the noise or if you feel resistance when spinning it by hand.
Tools and parts
- Screwdriver
- Damp cloth
Oven convection fan motorSearch: “oven convection fan motor replacement”
When to call a pro
If the fan blade spins with resistance or grinding after cleaning, have a technician replace the convection fan motor.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.