Haier
Ventilation fan or control fault (OTR models)
Microwave over-the-range vent fan does not run or runs only at one speed
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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.
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Possible Causes
Failed vent fan motor, Faulty fan speed switch or relay, Loose wiring to fan, Obstructed fan blades
How to Fix / Troubleshooting
Safety: Unplug the microwave or switch off the circuit breaker before servicing an over-the-range unit.
- Check fan settings: Verify that the fan is turned on via the control panel and that speed settings are correctly selected.
- Clean filters: Remove and clean grease filters. A clogged filter can cause overheating and fan issues.
- Listen for motor: If you hear a hum but no airflow, the fan may be jammed or failing.
- Internal inspection (advanced): Remove the top grille and access the fan assembly. Check for obstructions and ensure the fan spins freely.
- Replace fan motor or control: If the motor is defective or only one speed works, replace the vent fan motor or the control board relay/switch as needed.
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Repair Difficulty
Hard
4/5
Required Part
Vent Fan Motor
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