What does the Baxi 600 Series E680 fault code mean?
The E680 fault code on the Baxi 600 Series indicates a fault with the domestic hot water (DHW) temperature sensor. This issue can prevent the boiler from accurately regulating the water temperature, leading to inconsistent hot water supply.
Common Causes
- Faulty Temperature Sensor: The sensor may be malfunctioning or damaged, causing incorrect readings.
- Wiring Issues: Damaged or loose wiring connections to the temperature sensor can disrupt its functionality.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as it involves electrical components and safety risks. Attempting to fix it yourself could lead to further damage or safety hazards.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for replacing the DHW temperature sensor is around £120. This includes the cost of the part and labour, reflecting the typical pricing for such repairs in the UK.