BoilerFaultCodesPotterton 117 Fault Code
The Potterton 117 fault code means: your boiler has detected that there is too much water pressure inside the system, which can cause it to stop working to prevent internal damage.. It appears on 6 Potterton models in our database.
Technical description: Primary System Water Pressure Too High
DIY fix possible
Locate a radiator in your home that has a bleed valve.Place a cloth or small container under the valve.Open the valve slightly to release air and a small amount of water until the pressure gauge on the boiler drops to between 1.0 and 1.5 bar.
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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 31 August 2026