No display High
Your boiler has lost all power to the control screen because an internal electrical component has stopped working.
Technical description: 12V transformer failure
Typical repair cost: £140-£260 (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 No display — no call-out fees, no surprises.
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Parts commonly replaced
- 12V Transformer
- Integrated PCB
- Fuse
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