BoilerFaultCodesWhat the manual says
Manufacturer manualMaintenance message: Check the water pressure
DIY fix possible
Check the pressure gauge on the front of your boiler; it should ideally be between 1 and 1.5 bar.If it is below 1 bar, locate the filling loop (usually a silver braided hose under the boiler) to top up the pressure.Check your boiler service history record to see if an annual service is now due.
Avoid the next call-out bill
A cover plan would handle faults like S.76: no call-out fees, no surprise bills.
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Related fault codes
All 85 fault codes on the Energy System
Seeing a different code? Every code this model can display, in one place.
Related guides you might find useful
What pressure should my boiler be?
1 to 1.5 bar when cold on most UK boilers, from the manuals.
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Six most common causes of dropping pressure.
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On a combi it is usually the diverter valve. On a system boiler, the motorised valve.
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