Thermal fuse lockout High
Your boiler has overheated beyond its safety limit, causing it to shut down for protection.
Technical description: Reset boiler
Typical repair cost: £0-180 (including labour)
DIY fix possible
Locate the reset button on the front control panelPress and hold the reset button for several seconds until the boiler begins to restartMonitor the boiler to see if it fires up or locks out again
Protect yourself from future repair bills
A boiler cover plan would cover faults like Thermal fuse lockout — no call-out fees, no surprises.
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Parts commonly replaced
- Thermal fuse
- Heat exchanger harness
- Main heat exchanger
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