What does the Baxi 600 Series E750 fault code mean?
The E750 fault code on the Baxi 600 Series indicates that the domestic hot water (DHW) is overheating. This can lead to potential safety risks and requires immediate attention to prevent damage to the boiler or plumbing system.
Common Causes
- Faulty DHW Sensor: A malfunctioning sensor may incorrectly read the water temperature, causing the boiler to overheat the water.
- Blocked Heat Exchanger: A blockage can restrict water flow, leading to overheating as the heat cannot dissipate effectively.
Can I fix it myself? (DIY)
It is highly recommended to call a Gas Safe Engineer to diagnose and repair 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 E750 fault could range around £150 to £300, depending on whether the DHW sensor or heat exchanger needs replacement. This estimate includes parts and labour costs typical for such repairs.