Termet Intermittent Lockout / General Instability

Boiler frequently needs manual resetting to restore operation, with varying minor error indications or none at all.

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

Marginal ignition or flame detection on Termet burner, Loose electrical connections, PCB starting to fail, Poor gas supply stability

User checks:

Record when resets are needed (CH or DHW, weather conditions, other appliances running) to help diagnosis.
Ensure the boiler has a stable power and gas supply.

Technician checks:

Inspect and tighten all electrical connections inside the boiler.
Clean the burner, ignition electrode, and ionisation electrode.
Check gas pressures and combustion quality.
Monitor operation with instruments to identify failing components such as the PCB or gas valve.

Repeated manual resets are a sign of an underlying fault that must be corrected.

Hard 4/5

Ignition/Ionisation Electrodes or Main Control PCB

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