Vitotronic 300 High
Your boiler has detected an internal electronic failure within its main control system that is preventing the burner from firing safely.
Technical description: Burner control unit in an error mode
Typical repair cost: £350-650 (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 Vitotronic 300 — no call-out fees, no surprises.
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Parts commonly replaced
- Burner control unit
- Electronic PCB
- Ignition electrodes
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