BoilerFaultCodesWhat the manual says
Manufacturer manualProductinwaitingperiod/operationblockfunctionduetolowwaterpressure(flow/returnspreadtoolarge)
DIY fix possible
Check your boiler's pressure gauge on the front display; if it is below 1.0 bar, you likely need to top up the pressure.Locate the external filling loop (a silver flexi-hose under the boiler) and slowly open the valves to let water in until the needle reaches 1.2 to 1.5 bar.Close the valves tightly and restart the boiler.
Avoid the next call-out bill
A cover plan would handle faults like S.53: no call-out fees, no surprise bills.
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Related fault codes
All 90 fault codes on the Easicom3 System
Seeing a different code? Every code this model can display, in one place.
Related guides you might find useful
Hot water works but heating does not
On a combi it is usually the diverter valve. On a system boiler, the motorised valve.
Read →What pressure should my boiler be?
1 to 1.5 bar when cold on most UK boilers, from the manuals.
Read →No hot water but heating works
Almost always a stuck diverter valve on a combi.
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