Chaffoteaux Voltage Drop / Electrical Interference

Display or indicator lights flicker or reset when the burner ignites.

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

Weak mains supply, Loose neutral connection, Faulty PCB power supply, Shared circuit with heavy loads

Safety: Electrical work should be done with power isolated.

Check supply circuit: Ensure the heater is on a dedicated circuit where possible.
Tighten terminals: Inspect and tighten live and neutral connections at the appliance and consumer unit.
Measure voltage: Use a multimeter to check for significant voltage drop when the heater starts. If present, consult an electrician.
PCB replacement: If supply is stable but flicker persists, the PCB power supply may be failing.

Medium 3/5

Main Control PCB

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