Medium
117 on Baxi Suprima 40

Your boiler has too much water inside its system, which is causing it to shut down for safety.

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

Water pressure too high

From this model's manual
Verified against the Baxi Suprima 40 installation & service 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

Check that the silver filling loop valves are tightly closedBleed water from a radiator using a bleed key to reduce system pressureMonitor the pressure gauge to ensure it returns to between 1.0 and 1.5 barPress the reset button once the pressure is stabilised

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