High
1074 on Worcester Bosch Greenstar 8000 Life GR8300iW 35 S

Your boiler has temporarily stopped working because it has lost connection to a key internal temperature monitor.

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.

What the manual says

Manufacturer manual

No signal from the flow temperature sensor available 1. Connect the plug to the flow temperature sensor correctly. 2. Replace the flow temperature sensor. 3. Replace the connecting lead to the flow temperature sensor. 4. Replace the control unit.

From this model's manual
Verified against the Worcester Bosch/Worcester Bosch 8000 Life System 2 installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

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

1073View →1075View →

All 21 fault codes on the Greenstar 8000 Life GR8300iW 35 S

Seeing a different code? Every code this model can display, in one place.

10371065106810731075107629202924292529272946294829502963296429652966296729702971

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