What does the Baxi 600 Series E910 fault code mean?
The E910 fault code on the Baxi 600 Series indicates a “DHW dry fire” condition, which means that the boiler is attempting to heat domestic hot water (DHW) without sufficient water flow. This can lead to overheating and potential damage to the boiler.
Common Causes
- Low Water Pressure: Insufficient water pressure can prevent the boiler from detecting water flow, triggering the E910 fault.
- Blocked or Faulty Diverter Valve: A malfunctioning diverter valve may not direct water properly, causing the boiler to operate without water flow.
Can I fix it myself? (DIY)
If you are comfortable, check the water pressure gauge on the boiler and ensure it is within the recommended range (typically 1-1.5 bar). If the pressure is low, you can top it up using the filling loop. However, for any gas or electrical issues, it is crucial to call a Gas Safe Engineer.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the E910 fault could range from £150 to £300, depending on whether the issue is simply low water pressure or if a diverter valve replacement is needed, which can be more costly due to parts and labour.