What does the Baxi 600 Series E570 fault code mean?
The E570 fault code on the Baxi 600 Series indicates a “DHW dry fire” condition, which means the boiler is attempting to heat domestic hot water (DHW) without sufficient water flow. This can lead to overheating and potential damage if not addressed promptly.
Common Causes
- Low Water Pressure: Insufficient water pressure can prevent the boiler from detecting water flow, triggering the dry fire condition.
- Blocked or Faulty Diverter Valve: A malfunctioning diverter valve may not direct water correctly, causing the boiler to overheat without proper flow.
Can I fix it myself? (DIY)
If you are comfortable, check the water pressure gauge on your 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 issues related to the diverter valve or any gas/electrical components, it is essential to call a qualified Gas Safe Engineer.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the E570 fault could range from £150 to £300, depending on whether it requires a simple pressure adjustment or a more complex repair like replacing the diverter valve, which can be more costly due to parts and labour.