F0 290 High
Your boiler’s internal computer has lost contact with a vital control chip, meaning the system cannot run safely and will stay locked out.
Technical description: Control box is defective – HCM needs checking as it might not be inserted properly or need replacing
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 F0 290 — no call-out fees, no surprises.
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Parts commonly replaced
- HCM (Heat Code Module)
- PCB (Main Circuit Board)
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