What does the Baxi 600 Series E700 fault code mean?
The E700 fault code on the Baxi 600 Series indicates a flue gas temperature fault related to domestic hot water (DHW) operation. This typically suggests that the boiler is unable to maintain the correct temperature of the flue gases, which can affect efficiency and safety.
Common Causes
- Blocked Flue: A blockage in the flue system can prevent proper venting of exhaust gases, leading to overheating.
- Faulty Temperature Sensor: A malfunctioning temperature sensor may incorrectly read the flue gas temperature, triggering the fault code.
Can I fix it myself? (DIY)
It is strongly advised to call a qualified 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 resolving the E700 fault could range from £150 to £300, depending on whether a sensor replacement or flue cleaning is necessary. This cost reflects the complexity of the work and the need for professional expertise.