EC 256 High
Your boiler's computer system has detected an internal electronic fault, preventing the heating and hot water from starting up.
Technical description: The burner control unit has an error
Typical repair cost: £250-550 (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 EC 256 — no call-out fees, no surprises.
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Parts commonly replaced
- Burner Control Unit
- PCB (Printed Circuit Board)
- Wiring Harness
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