Medium
117 on Potterton Performa 24i HE

Your boiler has detected that there is too much water pressure in your heating system, which can put unnecessary strain on its internal components.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Book a service

This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

What the manual says

Manufacturer manual

Primary System Water Pressure Too High

From this model's manual
Verified against the Potterton Performa 24i He installation & service manual, page 47.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Locate a radiator in your home that is easily accessibleUse a radiator bleed key to gently open the bleed valveRelease a small amount of water into a cloth or container until the pressure gauge on the front of the boiler drops to between 1.0 and 1.5 barClose the valve tightly

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