RCA Relay or Control Output Failure

Microwave cavity light and fan run, but turntable and magnetron do not start (no heating).

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

Failed power relay on control board, Broken wiring to transformer or inverter, Faulty door monitor circuit preventing HV activation

Safety Warning: High-voltage circuits are dangerous. Limit DIY to basic checks.

Steps:

1. Confirm symptom: Verify that the fan and light operate but there is no heating and the turntable does not move.
2. Try different modes: Test multiple power levels and cook settings to see if any mode activates the turntable.

This pattern often indicates a control board or relay failure. Internal testing and repair should be performed by a qualified technician.

Professional Required 5/5

Main Control Board

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