112 High
Your boiler has detected an issue with the wiring or the sensors that monitor the water temperature returning to the unit.
Technical description: All Boilers
Typical repair cost: £100-220 (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 112 — no call-out fees, no surprises.
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Parts commonly replaced
- Return NTC thermistor
- Wiring harness
- Main control board
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