Prog. Not calling on htg, h/w works

[stem]

Ah OK, thanks. So I take it that this is a room thermostat of the non programmable type, and not a thermostat receiver?

Unfortunately I don't recognise its make / model, but I see by the schematic that the terminal marked L1 is linked internally to the switch contacts N/C and N/O. In which case I suspect that it doesn't need a permanent live supply. And could be controlled directly from the programmer. The instructions for it should confirm. In which case....

The original diagram you posted had a link between programmer terminals L and 1 which isn't required. I mention it in case you don't notice I've deleted it.

So basically, we're back to what @Johnmdc said to start with

In your second picture there is a white link between L and CH on this needs removing.

 

[Groovejet]

Stem....thankyou for the effort youve put in to help out, much appreciated. And Johnmdc thankyou

 

[Groovejet]

Finally everything working. I didnt even bother with existing clock and stat, i removed them as im sure they were causing problems also. The link that caused all of this! ( L to Ch1 ) I removed it a few times but nothing went right until i changed clock etc. Although connections on clocks were identical, so their just crap.
Fitted a Salus prog, and Salus stat. There simple and work like they should, also they look good with blue neon glow. Prog was £23-£24 and stat was about £10 or less. crazy prices.
So i removed link wire in cylinder wiring center.
Stat still had power when prog. was calling for heat, which was good. So it works.
Job finally sorted
Thankyou for your help, wouldnt be at this position without it.