360 V High
Your boiler's internal computer has lost communication with its identification chip or the chip installed is the wrong model for this unit.
Technical description: Incompatible code plug – check if a correct code plug is installed and exchange or reconnect code plug
Typical repair cost: £120-280 (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 360 V — no call-out fees, no surprises.
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Parts commonly replaced
- HCM Code Plug
- Boiler Control Board (PCB)
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