High
31 on Johnson Starley Comet 80

Your boiler's heating system thermometer is broken or disconnected, meaning it cannot tell how hot the water is to safely heat your home.

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

Centra heating supply sensor error (open or short)

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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Related fault codes

32View →30View →

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