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Hi, I have an excellent document describing this, please review it, and get back to me for clarification thanks Michael
thanks, ***** ***** new thermostat only uses 3 wires, disregard the wires original purpose...........determine which 3 wires you want to use, and designate one for positive.......one for negative..........and one as the communication wire
so at the thermostat do you have 12volts positive, 12volts negative, and the third wire (which is the communication wire ) attatched, and at the air conditioner do you have the 12volt to the control, and also to the thermostat? and comm wire atatched? does the display light up on the thermostat?
did you receive a new control unit and thermostat?
Hi what is the part number on the control box? thanks
I will opt out and allow another expert to help you.........the 2 pin connector is not used, thanks
What Michael gave you is correct..........some parts of the new box you won't use. Did the old thermostat have the leads from the furnace coming into the thermostat at that location or at the A/C location? Those would usually be the red and white bell wires. The new wiring depends on where those terminate. You may need 4 of the 10 wires instead of just 3. Get back to me and I can direct you further. A phone chat may be useful here. R.J.
Yes...........and now you won't use most of those. The new thermostat only uses 3 wires (most of the time) but that depends on how the furnace is wired up. As you know, the old thermostat controlled BOTH the furnace AND the A/C. The new one will as well. What I need from you is IF the old thermostat got the furnace leads from up above at the A/C (which I suspect) or did those leads come into the thermostat from the wall AT the thermostat. That will determine how this is wired up. There will be "extra" wires that won't be used AND a plug on the new control box that won't be used as well. So give me the layout you have and we can sort this out. R.J.
On the old control module, there would be a power IN lead. That should be marked as such with a "+" tag on it. Usually red/w white stripe. Do you have that?
All day...........but, I am working at my shop and may not get back to your right away. This would be easier over the phone.
Pacific Time Zone............
I am at lunch and when I get back to the shop I can grab one and give that too you. I plug with just two leads isn't used. The furnace leads are going to be used by the old furnace leads with a new female spade connector attached. Those should be the red and white bell wires. There were previously attached to the two blue wires coming out of the old control. Do you see those?
As far as colors you use goes.......white is a negative color. Red is a positive color. Use the orange for the common.
I should have gotten one out of the box to refresh my memory! The two lug plug is for the freeze control which has the yellow tag on it and a blue plug. The four lead plug has the red lead positive input lead, the black negative lead which goes to the negative post on the new thermostat, the orange lead which can be orange and goes to the common terminal on the thermostat and the red/w white stripe that is the positive lead TO the new thermostat. You can pick any colors out of your old harness you want, but sticking to red, orange and black would be easier to remember. What may be somewhat confusing is the old control had a power IN lead that was red w/white stripe (most of the time). Hook these up and then program it as per the instructions. Hopefully that will get you going. Get back to me if you need more as all follow ups are included in our fee. R.J.
That wire goes to the positive feed that came into the old control module. It is usually red with the white stripe on the box.........did you mark those? And you should have just one open lead in the A/C now and that should be it. And second question.........yes........they all hook together, so there will be THREE wires at that junction. The one from the thermostat, the one from the control box and the hot lead we were just discussing.
One of the three wires (red) goes to the red w/white stripe on the control box AND to the positive terminal on the thermostat. The 12 VDC power source is the SAME as it was before. That lead should be available as nothing would be hooked up to it like before. I think you should call me............