D.13 Medium
There is a communication problem with the pump that circulates hot water, which usually means your hot water or heating might not work as expected.
Technical description: Hot water circulation pump
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.13 — no call-out fees, no surprises.
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Parts commonly replaced
- Hot water circulation pump
- Pump wiring harness
- External pump controller
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