E14

Keston Flame Loss During Operation

Boiler intermittently locks out with E14, especially in windy conditions

Safety Warning

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

Unstable gas supply, Incorrect flue termination, Faulty flame sensor, Poor combustion setup

How to Fix / Troubleshooting

Safety: Repeated flame loss can lead to unburnt gas. Do not repeatedly reset; have the boiler inspected.

User checks:

Note when the fault occurs (high wind, multiple appliances running). Provide this information to the engineer.
Ensure external flue terminal is not obstructed.

Engineer checks:

Check gas inlet pressure under maximum load and ensure it remains within Keston limits.
Inspect flue routing and terminal position for exposure to strong prevailing winds; fit a suitable terminal guard or modify flue if required.
Clean and inspect the flame sensor and ignition electrodes; replace if worn.
Perform combustion analysis and adjust gas valve or replace if combustion is unstable.

Repair Difficulty

Hard 4/5

Required Part

Flame Sensor Electrode

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