A61 High
Your boiler's main control unit cannot talk to the gas valve, meaning it isn't receiving the signal it needs to burn fuel and provide warmth.
Technical description: No communication between controller and gas valve controller – could not be connected or valve damaged
Typical repair cost: £180-450 (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 A61 — no call-out fees, no surprises.
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Parts commonly replaced
- Gas valve controller
- Gas valve
- Main PCB
- Wiring harness
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