What does the Baxi 600 Series E440 fault code mean?
The E440 fault code on the Baxi 600 Series indicates a problem with the domestic hot water (DHW) fan, which may be malfunctioning or not operating correctly. This can lead to issues with hot water delivery and overall boiler performance.
Common Causes
- Faulty DHW Fan: The fan may be defective or have electrical issues preventing it from functioning properly.
- Blocked Ventilation: Obstructions in the flue or ventilation system can hinder the fan’s operation, leading to the fault code.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as it involves gas and electrical components that require professional expertise to ensure safety and compliance with regulations.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for fixing the DHW fan on a Baxi 600 Series boiler is approximately £200 to £300, which includes parts and labour. This cost reflects the complexity of the repair and the need for a qualified technician.