D.44 High
Your boiler is having trouble managing its flame correctly and has shut down as a safety precaution.
Technical description: Digitised ionisation potential error
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 D.44 — no call-out fees, no surprises.
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Parts commonly replaced
- Ionisation electrode
- Ignition lead
- Gas valve
- PCB
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