What does the Baxi 600 Series E920 fault code mean?
The E920 fault code on the Baxi 600 Series indicates that the domestic hot water (DHW) is overheating. This can lead to safety concerns and requires immediate attention to prevent potential damage or hazards.
Common Causes
- Faulty DHW Sensor: A malfunctioning sensor may incorrectly read the temperature, causing the boiler to overheat the water.
- Blocked Heat Exchanger: A blockage can restrict water flow, leading to overheating as the boiler struggles to maintain the desired temperature.
Can I fix it myself? (DIY)
It is strongly advised to call a Gas Safe Engineer for this issue, as it involves gas and electrical components that can be dangerous if handled improperly.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the E920 fault could range from £150 to £300, depending on whether the DHW sensor needs replacement or if the heat exchanger requires cleaning or replacement.