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Thanks for your help, After looking again I found a motorised valve down the back of the pump, after speaking with honeywell they said the ST9400c would be a 7 day replacement for the st712 so I went out and got one this morning and fitted it. It looks lovely, it goes on and off when it...

Yes the connection at the top is the back plate for the existing timer. There is no switch on the back of the timer or the bas plate. There is the wring diagram that just says for fixed wiring

on off power switch fused

Thanks for your help here are the pictures. If we have a pumped system and replace the programmer then decide to upgrade later by adding a motorised valvle will we need to replace the programmer again, as I have an urgent need to get the thing up and running. so a quick fix then an upgrade I...

I have a tank stats on the hot water tank which goes to the programmer. It is an oil fired boiler with two pipes going to it as far as I can see. If it is as I supect pums what are the rough likely costs of the two options you suggest? Thanks for you help

yes we can have the hotwater coming without the heating in the winter, but what we can do is have the hot water timings set indepedantly tot he water times, so for example we want our heating on to 11pm but the hot water could go off at 7pm if we could set it. Not sure if this is due to the...

Thanks for the responses D Hailsham I do not appear to have any motirised valves just a pump. Does this make a difference

Hi, I should start by saying I am totally DIY inept, but I have Honeywell 703010000b that seems to have stopped working, it will briefly for a mil second click into life if you press the rest button and I think I need to replace it. I am trying to establish if it has a standard back plate and...