Hot water but no central heating

[TONY]

Hi all im Tony and are new to this site I hope some one can help me with this problem if I turn my programmer to hot water boiler will fire up diverted will open and i get hot water however if i ask for C/H and no hot water boiler no longer fires up this been my problem any advise would be welcome

[alan_m]

Room thermostat set too low? Wireless room thermostat battery failing?

[John Rumm]

What kind of boiler is it? conventional heating boiler with separate hot water cylinder, or a combination boiler that uses no tank and heats water on demand?

Based on what you have said so far, it could be the room stat not working, or perhaps a valve not moving correctly.

You can read about the various ways in which these things can be configured here:

[TONY]

Hi There thanks for the response I have checked room stat and turned it up to full, boiler still not firing up ??? I think the problem might be the programmer not communicating to the boiler or a fault in the micro switch in the boiler will check it out tomorrow thanks Tony

[TONY]

Thanks for the reply the boiler is a glow-worm flexicom system boiler its on a S plan i have checked the valves and they seem to be working ok and so dose the pump room stat seems to trip in and out ok im thinking i have a problem with the programmer because when i have it on hot water demand it works fine boiler fires up and pipes in the airing cupboard get hot when I put the demand onto central heating light on the programmer come on but no response at the boiler when i make a demand for hot water and central heating ,boiler fires up both motorised valves move and all pipes in the airing cupboard get hot what do you think thanks Tony

[Bob]

On 23/12/2014 23:44, TONY wrote: |

sounds more like the micro switch in the ch motorised valve at fault. Find a wiring diagram for the valve and a multimeter,

[Roger Mills]

Agreed. Either the micro-switch has failed, or the valve is opening - but not far enough to operate the micro-switch.

[TONY]

Hi Bob yes your right i found that the micro switch on the ch valve was at fault ive changed it over and all is working well now.

*A BIG THANKS GOES OUT TO ALL WHO REPLIED WITH SOME ADVICE MANY THANKS HOPE YOU ALL HAVE A GREAT CHRISTMAS AND HAPPY NEW YEAR *****************************************************************

[newshound]

Well done, good result.

[Big Les Wade]

How do you mean, changed it over - swapped in a new one? How did you do that? It looks easier said than done on a Honeywell 3-way motorised valve.