Microwave over-the-range model exhaust fan does not run or runs only at one speed.
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Possible Causes
How to Fix / Troubleshooting
Safety Warning: Unplug the microwave or switch off the circuit breaker before servicing an over-the-range unit. Support the unit securely if removing from the wall.
Steps:
- Check the fan settings on the control panel; verify that the fan is not set to OFF or AUTO modes that may delay operation.
- Clean the grease filters and ensure the exhaust path is not blocked.
Technician-level:
- Access the exhaust fan motor from the top or rear of the unit.
- Inspect the blower wheel for obstructions and clean as needed.
- Test the fan motor for proper resistance and replace if open or seized.
- Check the fan relay or speed control on the control board.
Do not operate the range without proper ventilation if you cook frequently on the cooktop below.
Repair Difficulty
Required Part
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