How to fix Baxi 600 Series fault code E230

What does the Baxi 600 Series E230 fault code mean?

The E230 fault code on the Baxi 600 Series indicates a domestic hot water (DHW) flow fault, which typically means that the boiler is unable to detect the required flow of hot water. This can lead to inadequate hot water supply for taps and showers.

Common Causes

  • Blocked DHW Flow Sensor: A blockage in the flow sensor can prevent the boiler from detecting water flow correctly.
  • Low Water Pressure: Insufficient water pressure can disrupt the flow of hot water, triggering the fault code.

Can I fix it myself? (DIY)

It is advisable to call a Gas Safe Engineer for this issue, as it may involve gas or electrical components that require professional handling. Attempting to fix it yourself could pose safety risks.

Estimated Repair Cost (2026 UK Prices)

The estimated repair cost for resolving the E230 fault could be around £150 to £250, depending on whether the flow sensor needs cleaning or replacement, as well as any additional parts or labour required.