What does the Viessmann Vitodens 050-W E119 fault code mean?
The E119 fault code indicates low water pressure within the Viessmann Vitodens 050-W boiler system. This can lead to insufficient heating and may cause the boiler to shut down to prevent damage.
Common Causes
- Low Water Pressure: This can occur due to leaks in the system or insufficient water supply.
- Faulty Pressure Relief Valve: A malfunctioning valve may allow water to escape, leading to a drop in pressure.
Can I fix it myself? (DIY)
You can attempt to restore the water pressure by locating the filling loop and adding water to the system until the pressure gauge reads between 1-1.5 bar. If the issue persists or if you suspect a leak, it is advisable to call a Gas Safe Engineer.
Estimated Repair Cost (2026 UK Prices)
The estimated cost for repairing low water pressure issues, such as replacing a pressure relief valve, is around £150-£250. This includes parts and labour, as the valve is a common component that may need replacement.