Chaffoteaux User Interface Failure

Water heater display works but buttons or knobs do not respond.

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

Faulty control panel PCB, Damaged keypad membrane, Loose ribbon cable to main PCB, Software lock or child lock active

Safety: Isolate power before removing the front panel.

Check for lock function: Consult the user manual to see if a child lock or key lock is active and how to disable it.
Inspect ribbon cable: Remove the front panel and ensure the ribbon cable between the display board and main PCB is fully seated.
Look for moisture: Dry any condensation around the control panel and correct the source.
Replace control panel: If buttons remain unresponsive, replace the user interface board.

Medium 3/5

User Interface / Display PCB

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