A04 High
Your boiler has shut down because it detected a repeat issue with its exhaust system three times in one day.
Technical description: Flue gas fault – fault F07 happened 3 times in the last 24 hours
Typical repair cost: £120-350 (including labour)
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Protect yourself from future repair bills
A boiler cover plan would cover faults like A04 — no call-out fees, no surprises.
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Parts commonly replaced
- Pressure switch
- Flue fan
- Venturi tube
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