What does the Baxi 600 Series E290 fault code mean?
The E290 fault code on the Baxi 600 Series indicates a fault with the domestic hot water (DHW) valve. This typically means that the valve is either stuck, malfunctioning, or there is an issue with the control signals to the valve.
Common Causes
- Stuck DHW Valve: The valve may be physically stuck due to mineral build-up or mechanical failure.
- Electrical Issue: There could be a problem with the wiring or control board that prevents the valve from operating correctly.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer to diagnose and repair this issue, as it involves gas and electrical components that can be hazardous if handled improperly.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for fixing the DHW valve fault is around £150 to £250. This includes the cost of parts and labour for a qualified engineer to replace the valve or repair any associated electrical issues.