What does the Viessmann Vitodens 050-W E379 fault code mean?
The E379 fault code indicates a problem with the system flow switch, which is responsible for detecting the flow of water through the heating system. This fault can prevent the boiler from operating correctly, leading to heating and hot water issues.
Common Causes
- Blocked Flow Switch: Debris or sediment buildup can obstruct the flow switch, preventing it from functioning properly.
- Electrical Fault: A malfunction in the wiring or connections to the flow switch can lead to incorrect readings and trigger the fault code.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer to address this issue, as it involves gas and electrical components that require professional expertise. Attempting to fix it yourself could pose safety risks.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for fixing the flow switch issue is around £150 to £250. This includes the cost of the replacement part and labour, as flow switches typically require professional installation to ensure safety and compliance with regulations.