BoilerFaultCodesWhat the manual says
Manufacturer manualWater press. sensor (signal too strong): Water pressure too high
From this model's manual
Verified against the Vaillant/Vaillant Ecotec Plus 938 Vui 286 5 5 Isim installation & service manual.
DIY fix possible
Locate a radiator in your home and grab a radiator bleed key and a small cloth.Hold the cloth under the radiator bleed valve and gently open it until water starts to escape.Watch your boiler's pressure gauge drop until it sits in the normal green zone (usually between 1.0 and 1.5 bar).Firmly close the radiator bleed valve and check your boiler display to see if the code clears.
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Related fault codes
All 59 fault codes on the ecoTEC plus 938 VUI 286/5-5 R6
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