BoilerFaultCodesYour boiler has too much water in the system, which causes it to shut down for safety.
Turn off your boiler and stop using gas appliances. Call a Gas Safe engineer now — this fault can be dangerous if ignored.
Technical description: High water pressure error
What causes this fault?
This fault occurs when the water pressure inside your boiler exceeds a safe limit, usually because the heating system has been overfilled via the manual filling loop. It can also be caused by a faulty tap on that filling loop leaking water into the system or an internal failure of the expansion vessel which normally helps manage pressure changes.
DIY fix possible
Locate a radiator and use a bleed key to release a small amount of water into a container.Monitor the pressure gauge on the front of the boiler until the needle falls between 1.0 and 1.5 bar.Ensure the silver filling loop taps underneath the boiler are fully closed.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Protect yourself from future repair bills
A boiler cover plan would cover faults like 10E — no call-out fees, no surprises.
Affiliate links — we may earn a commission at no extra cost to you.
Ravenheat HE 80/90 / HE 25-30s / HE 80-98s / HE 8-98s / HE 25-30s compact is discontinued — time for a new one?
Parts for discontinued models can be hard to find and expensive. A new A-rated boiler could save you money on both repairs and energy bills.
Affiliate links — we may earn a commission at no extra cost to you.