What does the Glow-worm Ultimate F82 fault code mean?
The F82 fault code on the Glow-worm Ultimate indicates a problem with the domestic hot water (DHW) temperature, suggesting that the boiler is unable to heat the water to the required temperature. This can lead to insufficient hot water supply for taps and showers.
Common Causes
- Faulty DHW Temperature Sensor: The sensor may be malfunctioning, causing incorrect temperature readings and preventing the boiler from heating water properly.
- Blocked Heat Exchanger: A blockage in the heat exchanger can restrict water flow, leading to inadequate heating and triggering the F82 fault code.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as it involves gas and electrical components that require professional handling. Attempting to fix it yourself could be dangerous.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the F82 fault could be around £150 to £250, primarily depending on whether the DHW temperature sensor needs replacement or if the heat exchanger requires cleaning or replacement.