What does the Worcester Bosch Greenstar Si E119 fault code mean?
The E119 fault code indicates low water pressure within the Worcester Bosch Greenstar Si boiler system. This can prevent the boiler from operating efficiently and may lead to further issues if not addressed promptly.
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 carefully adding water to the system until the pressure gauge reads between 1 and 1.5 bar. If the issue persists or if you suspect a leak, it is advisable to contact a Gas Safe Engineer.
Estimated Repair Cost (2026 UK Prices)
The estimated repair cost for addressing low water pressure issues, such as replacing a faulty pressure relief valve, could be around £150 to £250. This includes parts and labour, reflecting the complexity of the repair and the need for a qualified technician.