What does the Worcester Bosch Greenstar i E119 fault code mean?
The E119 fault code indicates that the boiler has detected low water pressure in the system. This can prevent the boiler from operating efficiently and may lead to further issues if not addressed promptly.
Common Causes
- Water Leak: A leak in the heating system can cause a drop in water pressure, leading to the E119 fault code.
- Pressure Relief Valve Issue: If the pressure relief valve is faulty or has been activated, it may allow water to escape, resulting in low pressure.
Can I fix it myself? (DIY)
You can attempt to fix low water pressure by checking the pressure gauge on your boiler and using the filling loop to add water to the system until it reaches the recommended pressure (typically 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 repair cost for addressing low water pressure issues, such as replacing a pressure relief valve, is around £150-£200. This includes parts and labour, as the valve is a common component that may need replacement if it is found to be faulty.