F5
Midea Relay / Power Control Fault

Microwave shows F5; unit may not start or may shut down unexpectedly.

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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

Stuck relay on control board, Burnt relay contacts, Faulty power relay driver circuit, Overheated control PCB

How to Fix / Troubleshooting

Safety first: Unplug the microwave. Internal board work should be done by experienced persons.

User-level action:

  • 1. Power reset: Unplug for 10 minutes, then plug back in and test. If F5 returns, internal repair is needed.

Technician-level actions:

  • Inspect control board relays for discoloration or burning.
  • Test relay operation and coil resistance.
  • Replace the main control board if relays or driver circuits are defective.
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Repair Difficulty

Professional Required 5/5

Required Part

Main Control Board (PCB) for Midea Microwave
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