Medium
117 on Potterton Promax Ultra Combi ErP

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.

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

Shared across the Promax Ultra Combi range
This code is shared by the boilers in this range, which use the same control board. It may not be printed in this exact variant’s manual.
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 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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Related fault codes

E117View →E118View →

All 24 fault codes on the Promax Ultra Combi ErP

Seeing a different code? Every code this model can display, in one place.

091520284055109110118125128130133134135154160270321384E118E128E133

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