Café Low-Voltage Control vs. High-Voltage Drive Separation

Microwave keypad and display work, but interior light and fan do not come on when cooking; unit may or may not heat.

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 door switch controlling fan/light, Open fan/light relay, Wiring harness issue between control and fan/light circuits

Safety first: Unplug the Café microwave.

Steps to try:

Door test: Open and close the door several times. If the interior light never comes on, a door switch or lamp circuit is suspect.
Check if heating: Test with a cup of water. If it heats but there is no fan or light, multiple circuits are affected.
Service: A technician should test the door switches, lamp circuit, fan circuit, and associated relays on the control board.

Hard 4/5

Door Switch Assembly

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