How to fix Baxi 600 Series fault code E970

What does the Baxi 600 Series E970 fault code mean?

The E970 fault code on the Baxi 600 Series indicates a fault with the domestic hot water (DHW) pump. This typically means that the pump is either not functioning correctly or has failed, affecting the boiler’s ability to provide hot water.

Common Causes

  • Blocked DHW Pump: Debris or scale buildup can obstruct the pump, preventing it from operating effectively.
  • Electrical Fault: Issues with the wiring or connections to the pump can lead to a failure in operation.

Can I fix it myself? (DIY)

It is recommended to call a Gas Safe Engineer for this issue, as it involves electrical components and potential gas safety risks. Attempting repairs without proper knowledge can be dangerous.

Estimated Repair Cost (2026 UK Prices)

The estimated repair cost for fixing the DHW pump fault is around £250 to £350. This includes parts and labour, as the pump may need to be replaced along with any necessary electrical repairs.