Farberware Control Logic / Relay Drive Failure

Microwave fan runs but unit does not count down or start heating.

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

Faulty control board, stuck fan relay, software glitch, keypad input not registering START command

How to Fix / Troubleshooting

Steps:

Unplug the microwave for 5–10 minutes to reset the control board, then plug back in and set the clock.
Try different cook modes (e.g., timed cook, express cook) to see if any start properly.
Check if the START button is responsive; if not, the keypad may be faulty.

If the fan runs but the timer does not count down and no heating occurs, the control board relays or logic are likely defective. Replacement of the main control PCB is required.

Repair Difficulty

Hard 4/5

Required Part

Main Control Board

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