Select a fault code
Failed to ignite after multiple attempts.
Flame extinguished unexpectedly.
Fan speed outside permitted range.
Pressure below minimum.
System pressure very low (below 0.3 bar).
Gas valve not operating correctly.
Flow temperature sensor has failed or is reading incorrectly.
Flue restriction or low gas inlet pressure.
High-limit thermostat tripped due to overheating.
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Prices shown are indicative — actual cost depends on your boiler age and policy type.
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