BoilerFaultCodesWhat the manual says
Manufacturer manualWater pressure too high
Shared across the Energy7 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.
DIY fix possible
Locate a radiator in your home that has a bleed valvePlace a cloth and container under the valveOpen the valve slightly to release a small amount of water until the pressure gauge on the boiler drops to the recommended level (usually between 1.0 and 1.5 bar)Tighten the valve firmly
Find a Gas Safe engineer
Search the official register →
Boiler cover options
Avoid the next call-out bill
A cover plan would handle faults like S.41: no call-out fees, no surprise bills.
Approved partner
Get a quote →
Domestic Appliance Guard
Unlimited call-outs, 24/7 helpline, no price-hike promise
Affiliate links. We may earn a commission at no extra cost to you.
Related fault codes
All 95 fault codes on the Energy7 System
Seeing a different code? Every code this model can display, in one place.
ConnectionF.00F.01F.10F.11F.13F.20F.22F.23F.24F.25F.27F.28F.29F.32F.49F.61F.62F.63F.64F.65F.67F.68F.70F.71F.72F.73F.74F.75F.76F.77F.78F.83F.84F.85F.86F.87F.88F.89F.91F.97F22P.01P.02P.03P.04P.05P.06P.07P.10S.0S.01S.02S.03S.04S.05S.06S.07S.08S.10S.11S.13S.14S.15S.16S.17S.20S.21S.22S.23S.24S.25S.26S.27S.28S.30S.31S.32S.33S.34S.39S.42S.46S.53S.54S.76S.88S.91S.96S.97S.98S.99S.108S.109