High
1073 W on Worcester Bosch Heatslave

Your boiler's internal thermometer has developed an electrical fault and can no longer accurately measure the temperature of the water inside.

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

Short circuit of the flow temperature sensor – the temperature sensor may need replacing

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

1074 WView →E9View →

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