C2 High
Your boiler's internal memory card has developed a communication fault, meaning the control system cannot verify the specific settings for your model.
Technical description: Boiler chip card (BCC) fault
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 C2 — no call-out fees, no surprises.
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Parts commonly replaced
- Boiler Chip Card (BCC)
- Printed Circuit Board (PCB)
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