Boiler supplies HW but not CH.

[SemperFi]

Hi,

I have a problem with the central heating on my boiler - Jaguar 28. The hot water runs fine but nothing happens when the CH should run. All the while it has not displayed any of the Jaguar fault message codes.

I have switched off and re-started the boiler - it goes through the usual procedure and then goes silent. CH doesn't work but DHW does.

As far as I can work out the pump does not appear jammed and there is plenty of water in the system.

Any ideas?

Thanks

 

[kevplumb]

roomstat

 

[SemperFi]

Thanks KevPlumb,

the radiators all have TRVs except one in the "drying cupboard" next to the boiler cupboard which hasn't. It is permanently open for drying purposes and as a "by-pass" radiator.

Just in case I have just gone round and shut and then re-opened all TRVs. No difference.