Boiler shows E24, no burner operation, may be linked to flue sensor or safety chain

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

Tripped flue spillage thermostat, Faulty flue sensor, Blocked flue, Loose wiring in safety chain

Safety first: Potential flue gas spillage. Turn off the boiler and ventilate the area. Do not reset repeatedly.

Check for obvious flue issues: Inspect the flue terminal for blockage. Do not dismantle the flue yourself.
Reset once (if accessible): Some flue spillage thermostats have a manual reset button. Only reset after the boiler has cooled and the cause of overheating is addressed.
Professional inspection: A technician must check the flue integrity, test the spillage device, and verify safe operation.

Professional Required 5/5

Flue Spillage Thermostat

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