BoilerFaultCodesWhat the manual says
Manufacturer manualPrimary System Water Pressure Too High
What causes this fault?
This fault occurs when the water pressure inside your system has risen above the safe operating limit. The most common reason is that the filling loop valve used to top up the boiler has been left slightly open or is leaking water into the system. It can also be caused by a failure in the expansion vessel, which is meant to handle the natural pressure increases that happen when water is heated.
DIY fix possible
Locate a radiator in your home, preferably one upstairs.Place a cloth or small container under the radiator bleed valve.Use a radiator bleed key to slowly release a small amount of water until the pressure gauge on the front of your boiler drops into the green zone (usually between 1 and 1.5 bar).Once the pressure is correct, tighten the bleed valve securely.
Avoid the next call-out bill
A cover plan would handle faults like 117: no call-out fees, no surprise bills.
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