What does the Viessmann Vitodens 050-W E375 fault code mean?
The E375 fault code indicates a problem with the high limit switch in the heating system. This switch is designed to prevent overheating by shutting down the boiler if the water temperature exceeds safe levels.
Common Causes
- Overheating: This can occur due to a malfunctioning thermostat or a blocked heat exchanger, preventing proper heat dissipation.
- Faulty High Limit Switch: The switch itself may be defective or have wiring issues, leading to incorrect readings and triggering the fault code.
Can I fix it myself? (DIY)
It is recommended to call a Gas Safe Engineer for this issue, as it involves electrical components and safety risks. Attempting to fix it yourself could lead to further damage or safety hazards.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing the E375 fault code is around £150 to £250. This includes the cost of a new high limit switch and labour, as it requires professional installation to ensure safety and compliance with regulations.