BoilerFaultCodesPotterton 117 Fault Code
The Potterton 117 fault code means: your boiler has detected that there is too much water pressure in your heating system, which can put unnecessary strain on its internal components.. It appears on 2 Potterton models in our database.
Technical description: Primary System Water Pressure Too High
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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Potterton models that show the 117 fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Potterton 117 fault code information on this page is sourced and cross-checked against the official Potterton service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026