Hooking a heating only t-stat [for out door wood stove] to electronic t-stat thought I could connect red and greeen to heating t-stat .Sounded good but ac condensing unit comes on,not just the blower on furnace .thinking problem ls the electronic t-stat I don't understand why this wouldn`t work must back feed through electronic t-stat and pick up ac relay on furnace control board any ideas thanks Vern

Yes buy a 2 stage heat thermostat or use a isloation relay. If you cannot hook up these items then I suggest Calling for a ON SITE inspection of what you are trying to do and follow the professionals advice once they see your set up.

Yes buy a 2 stage heat thermostat or use a isloation relay. If you cannot hook up these items then I suggest Calling for a ON SITE inspection of what you are trying to do and follow the professionals advice once they see your set up.

Easy fix think I will put in summer winter switch for now easier than pulling wire through finished walls thanks