Mitsubishi Electric Keypad / Control Panel Failure

The unit powers on, but buttons do not respond or respond intermittently.

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

Worn membrane switches, moisture ingress into the control panel, loose ribbon cable to the main PCB, failed display/control PCB.

Safety: Unplug the unit before removing the control panel.

Steps:

Drying: If the panel was exposed to moisture, leave the unit unplugged in a dry place for 24 hours and then retry.
Inspect ribbon cable: Remove the control panel and check the flat cable between the panel and the main PCB. Reseat both ends.
Check for corrosion: Look for green/white corrosion on the panel PCB. If present, the display/control PCB should be replaced.
Replace keypad: If specific buttons never work, replace the control panel assembly.

Medium 3/5

Control Panel / Display PCB

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