Hot water prob

[Mike]

When I turn my programmer to heat the water, nothing happens until I turn the heating demand on as well. Could it be a faulty cylinder stat? Thanks

[ARWadsworth]

It could be. But look at

let us know what type of system you have

Adam

[ARWadsworth]

I also meant to ask. Is this fault new? ie new fault or your new house? Has anything been changed on the heating?

Adam

[Mike]

[ARWadsworth]

Do you have access to a multimeter? You could check the tank stat with this, but it is more likely to be a buggered 3 port valve.

everything you need into words.

Adam

[Mike]