Summit
Poor Ventilation / Exhaust Performance
Over-the-range microwave exhaust fan is very weak or ineffective
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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
Clogged grease filters, Incorrect vent damper installation, Blocked ductwork, Failing exhaust fan motor
How to Fix / Troubleshooting
Safety: Unplug the microwave before removing filters or accessing the fan.
Steps:
- Remove and clean the grease filters with warm soapy water; dry completely.
- Check the charcoal filter (for recirculating installations) and replace if saturated.
- Verify the vent damper is installed correctly and not stuck closed.
- Inspect the ductwork for obstructions or crushed sections.
If airflow remains weak, test and replace the exhaust fan motor as needed.
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Repair Difficulty
Medium
3/5
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