2946 V High
Your boiler's internal computer chip is either missing or has failed, meaning the system doesn't know which specific model it's supposed to be.
Technical description: Incorrect code plug detected – the code plug needs replacing
Typical repair cost: £120-£220 (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 2946 V — no call-out fees, no surprises.
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Parts commonly replaced
- Coding Plug (KCM)
- Main PCB
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