360 High
Your boiler's computer chip has failed or is recognized as incorrect, meaning the main brain of the boiler cannot talk to its control board.
Technical description: Heat control module (HCM) invalid – the inserted HCM does not correspond with the control box
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 360 — no call-out fees, no surprises.
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Parts commonly replaced
- Heat Control Module (HCM)
- Main Printed Circuit Board (PCB)
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