No not the same as the valve.... that's called a three port valve! ;-)
Do you have some form of timer or programmer that let you choose when
the heating is on, and how many times during the day?
If so, that is your controller. It may even be built into the boiler.
Often the call for heat from the stat also goes through the controller.
Hence they both need to be saying "on" for anything to happen.
The final call for heat that goes to the boiler may also pass through a
microswitch on the valve. It will depend on how this was wired as to if
it is also at risk from damage from the short - without a full wiring
diagram of how yours has been setup it i difficult to say for sure.
(I had a controller relay fail once when a rodent nibbled through a
heating controller cable and cause a short!)
Yep, I have a Danfoss wall timer (electric rotary type). I suspected
something in there might have blown as it's the only thing left really that
I can't check. I did order a new one funnily enough, a digital replacement
of the same model to give me more control. If only it would arrive this
The valve is also a standard 3-way Danfoss. Is this likely to have a relay
too, or is the wall timer the likely culprit?
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