ch not obeying thermostat

[chadspad]

G'day, I've a Stelrad Ideal Classic NF40 boiler with a Honeywell ST6300A programmer & H/well T40 t/stat in the lounge.The ch comes on at the right times, cuts out as you'd expect but then refuses to come back on other than by turning the boiler off & on. Anyone know what's playing up ?

 

[AnonymousImport]

Either you room has reached temperature that the thermostat is set at or more probably duff thermostat.

 

[AnonymousImport]

Cheers Anon , I was pretty (years ago) much set on that but also wondered if a heat sink effect might mess up the settings as t/stat
is on wall between neighbours even though the air temp. is obviously well below the t/stat setting.

 

[nussys]

I also have a Stelrad Ideal Classic boiler and have the same problem. Have you managed to resolve the problem, if so how??

Cheers

G'day, I've a Stelrad Ideal Classic NF40 boiler with a Honeywell ST6300A programmer & H/well T40 t/stat in the lounge.The ch comes on at the right times, cuts out as you'd expect but then refuses to come back on other than by turning the boiler off & on. Anyone know what's playing up ?

 

[chadspad]

sorry, thought this was dead in the water. turned out boiler PCB was fragged. Fine & dandy once new one fitted.