Maytag Stuck Hood Fan Relay or Sensor Control

Microwave fan (hood vent fan) runs continuously or will not turn off, even when not cooking.

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

Stuck fan relay on control board, Faulty hood fan switch, Overheat sensor keeping fan on, Control board logic fault

How to Fix / Troubleshooting

Safety first: Unplug the microwave before accessing the control panel.

Usage-related:

Some models automatically run the hood fan when the cooktop below is hot; it may stay on until the sensor cools.
Allow time for the area to cool and see if the fan shuts off.

If fan never shuts off:

Remove the control panel and inspect the control board for a stuck or welded fan relay.
Check any manual fan switches for sticking or mechanical failure.

Corrective action:

Replace the electronic control board if the fan relay is stuck closed.
Replace a faulty hood fan switch if equipped.

Repair Difficulty

Hard 4/5

Required Part

Electronic Control Board

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