What does the Baxi 600 Series E320 fault code mean?
The E320 fault code on the Baxi 600 Series indicates a domestic hot water (DHW) communication error, which suggests that the boiler is unable to properly communicate with the DHW system. This can lead to issues with hot water supply and may require troubleshooting to resolve.
Common Causes
- Faulty DHW Sensor: A malfunctioning sensor can disrupt communication between the boiler and the DHW system.
- Wiring Issues: Damaged or loose wiring connections can prevent proper signals from being transmitted, leading to communication errors.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for any repairs related to gas or electrical components. Attempting to fix these issues without proper training can be dangerous.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for resolving the E320 fault code is around £150 to £250, primarily due to the potential need for replacing the DHW sensor or repairing wiring, which involves both parts and labour.