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
Check that the external filling loop valves are tightly closed.Bleed water from a radiator using a radiator key to reduce the system pressure.Monitor the pressure gauge until it returns to the normal range (typically 1.0 to 1.5 bar).Press the reset button if the boiler does not restart automatically.
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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