F11 High
Your boiler is having trouble communicating with its control panel, which means it isn't receiving the instructions it needs to provide heating or hot water.
Technical description: User interface connection fault
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 F11 — no call-out fees, no surprises.
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Parts commonly replaced
- User Interface PCB
- Main Circuit Board (PCB)
- Internal Wiring Harness
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