What does the Baxi 600 Series E550 fault code mean?
The E550 fault code on the Baxi 600 Series indicates a flame failure during the domestic hot water (DHW) operation. This means that the boiler is unable to detect a flame when it attempts to heat water, which can lead to a lack of hot water supply.
Common Causes
- Blocked Flue: A blockage in the flue can prevent proper ventilation, leading to flame failure.
- Faulty Flame Sensor: If the flame sensor is dirty or malfunctioning, it may not detect the flame, causing the boiler to shut down.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for any gas or electrical issues. Attempting to fix these problems without proper training can be dangerous.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the E550 fault could range around £150 to £250, depending on whether the flame sensor needs cleaning or replacement, as well as any additional parts or labour required.