Chaffoteaux User Interface / Keypad Fault

Furnace display works but buttons or controls on the fascia 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 membrane, Loose ribbon cable to main PCB, Liquid ingress into control panel, Control board interface fault

Safety: Isolate power before removing the front panel.

Power cycle: Turn off power for 60 seconds and restore to clear temporary software glitches.
Inspect ribbon cable: Remove the front panel and check that the ribbon cable from the display/keypad to the main PCB is fully seated and undamaged.
Dry any moisture: If there are signs of condensation or spills, allow the panel to dry completely before reassembly.
Replace panel (professional): If buttons remain unresponsive, the user interface board or main PCB may need replacement.

Medium 3/5

User Interface / Display Board

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