Viessmann boilers High
Your boiler has detected an internal communication failure or a problem with the burner control unit, preventing it from firing up.
Technical description: Control mode
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 Viessmann boilers — no call-out fees, no surprises.
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Parts commonly replaced
- Burner Control Unit
- PCB (Main Circuit Board)
- Wiring Harness
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