Central heating problem, help!!!!

[alvin100]

Can anyone help me with my hot water problem, I have hot water storage tank and a central heating boiler which heats both the heating and hot water.
I now find that I cant heat my hot water, when I press the hot water 'on' or 'overide' switch on my controller the boiler does not fire up. but if the central heating is running then I can heat the hot water.
So is it a problem with the controller, or perhaps the changeover valve near the tank.
Any suggestions please.

Alvin

[Hard@it]

Methinks it is either a fault on your 3 port or your two port motorised valve. If you look closely you will see a lever and arrow on it , try pushing it along when your time clock is asking all to be off, and see and listen.

[alvin100]

Thanks hard@it. I suspected the motorised valve to be the problem although the water does heat up if I activate the central heating first to light the boiler, hence the reason Im now suspecting the time clock.

[Hard@it]

If your timeclock is switching to either of the heating and hot water valves at your set times then you must ensure the valve (s) is actuating. I am sure it is the valve motor that is prob.