Hi, I have a honeywell st699. The controller works fine but in order to get my heating to come on I need to have the hot water going at the same time.
I suspect its either a valve issue or that the wiring on the controller is wrong. The wiring will be easier to fix if that's what it is. Can anyone in the know take a look and give me their thoughts?
Thanks in advance, Rob.
I suspect its either a valve issue or that the wiring on the controller is wrong. The wiring will be easier to fix if that's what it is. Can anyone in the know take a look and give me their thoughts?
Thanks in advance, Rob.