Both HW and CH are set to come on in the morningwith the CH coming on first. However, this morning the central heating didn't need to fire because the room stat was set pretty low so it never got going. When the HW was scheduled to come on - nothing. The Programmer was calling for heat but the boiler wasn't running. Went to the stat on the cylinder which is set to 60 degrees.
I turned the stat down so I could see/hear when it clicked to find out the temp of the water in the cylinder which was about 25ish. Turned the stat back up and the zone valve opened (its right next to the cylinder - gravity fed) and the boiler started.
However, when the central heating has been running beforehand there is no problem with the HW. I also turned the CH off on the weeken and left just the HW to come on and the same thing happened.
Could this be a faulty cylinder stat..?
I turned the stat down so I could see/hear when it clicked to find out the temp of the water in the cylinder which was about 25ish. Turned the stat back up and the zone valve opened (its right next to the cylinder - gravity fed) and the boiler started.
However, when the central heating has been running beforehand there is no problem with the HW. I also turned the CH off on the weeken and left just the HW to come on and the same thing happened.
Could this be a faulty cylinder stat..?