Display shows “E4”; unit may freeze or ignore button presses.

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

Damaged membrane keypad, Liquid intrusion under control panel, Loose ribbon cable between keypad and control PCB, Shorted button contacts

Safety first: Unplug the unit before cleaning the control panel.

Dry out moisture:
- If the panel was exposed to spills or heavy steam, leave the unit unplugged in a warm, dry place for 24 hours.
Clean the panel surface:
- Wipe with a slightly damp cloth and then dry thoroughly.
Test buttons:
- After drying, plug in and test each button individually to see if the error recurs.

If E4 persists, the keypad membrane or ribbon cable is likely damaged and the entire control panel assembly may need replacement.

Hard 4/5

Keypad Membrane Panel

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