D,11 High
Your boiler is struggling to push hot water through your radiators because the external pump that circulates the water is not working correctly.
Technical description: Status external heating pump error
Typical repair cost: £180-£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 D,11 — no call-out fees, no surprises.
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Parts commonly replaced
- External circulation pump
- Wiring harness
- Pump head
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