BoilerFaultCodes flashing pressure value Your boiler has too much water inside its system, which is causing it to shut down to prevent damage from over-pressurisation.
Your boiler has too much water inside its system, which is causing it to shut down to prevent damage from over-pressurisation.
What to check first
- Check that the filling loop valves (the blue or black handles under the boiler) are closed tightly.
- Turn off the boiler and wait for the radiators to cool down.
- Bleed water from a radiator using a bleed key into a container until the pressure gauge on the boiler drops back down to 1.5 bar.
Parts commonly replaced
- Filling loop valve
- Expansion vessel
- Pressure relief valve (PRV)