BoilerFaultCodesWhat the manual says
Manufacturer manualno heating required
What causes this fault?
This status appears when your boiler’s internal computer confirms there is currently no demand for central heating from your room thermostat or programmer. It is the boiler's way of standing by and saving energy because your home has already reached the desired temperature. Once the room temperature drops below your target setting, the boiler will automatically exit this mode and fire up again.
This code is frequently seen during the transition into spring and summer when heating is used less often or turned off entirely.
DIY fix possible
Check that your room thermostat is turned up higher than the current room temperatureEnsure your heating programmer or timer is set to 'On'Check that the thermostatic radiator valves (TRVs) are turned to an open position
Avoid the next call-out bill
A cover plan would handle faults like S.00: no call-out fees, no surprise bills.
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