Emergency
F7 on Worcester Bosch Greenstar R29 40 HE

Your boiler has detected that the internal flame is still burning even though it should have turned off, which is a significant safety precaution.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Act immediately

Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now. This fault can be dangerous if ignored.

What the manual says

Manufacturer manual

Flame detected even though appliance switched off. Check electrode assembly, dry pcb. Flue clear?

From this model's manual
Verified against the Worcester Bosch/Worcester Bosch Greenstar R29 R40 He installation & service manual, page 104.
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 emergency 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

EAView →F0View →

All 22 fault codes on the Greenstar R29 40 HE

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

2.02.42.52.63.35.05.29.3b1C1d3E2E9EAF0FAFdP1P1, P2, P3, P1...P2P3

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