What does the Baxi 600 Series E300 fault code mean?
The E300 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 malfunctioning or not operating correctly, which can affect the heating of water in the system.
Common Causes
- Blocked DHW Pump: Debris or scale buildup can obstruct the pump, preventing it from functioning properly.
- 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 to fix it yourself could lead to further complications.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for the E300 fault could be around £150 to £250, depending on whether the pump needs cleaning or replacement. This cost includes parts and labour for a qualified engineer to diagnose and fix the issue.