Unknown
F7 on Worcester Bosch Bosch Greenstar ZWBR 7-25A

Worcester Bosch Bosch Greenstar ZWBR 7-25A fault code F7

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

What the manual says

Manufacturer manual

Incorrect ionisation (flame sense) signal.

From this model's manual
Verified against the Worcester Bosch/Worcester Bosch Bosch Greenstar Mk1 I S 1999 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 fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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All 15 fault codes on the Bosch Greenstar ZWBR 7-25A

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

A5A7ACb1C1C4C6CCd3E0E2E9EAFA

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