High
ER 14 + SPANNER on Johnson Starley Warmcair DW

Your boiler has shut down because it detected a sudden, unsafe rise in temperature, likely caused by water not flowing through the system correctly.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description

Over-heat (temp increase of >2º/s)

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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