Microwave shows E90 and will not start; may indicate a general control fault.

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

Corrupted control firmware, Failed main control board, Power surge damage, Shorted low-voltage component

Safety first: Unplug the Café microwave.

Steps to try:

Extended power reset: Leave unplugged for 15–20 minutes, then restore power.
Check environment: Ensure the microwave is not exposed to excessive moisture or heat that could affect the control board.
If E90 returns: The main control board likely needs replacement. This should be done by an authorized Café technician.

Professional Required 5/5

Main Control Board

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