High
1076 W on Worcester Bosch Hideaway

Your boiler has lost communication with its internal temperature sensor, preventing it from knowing how hot it is and causing the system to shut down for safety.

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

No signal from the temperature sensor at the heating block available – replace the temperature sensor, the connecting lead or the control unit

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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