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It's cold out, and my Central Air kicks on every time my furnace kicks in. I get heat, but don't think my outside unit (fan) should be kicking in each time my furnace kicks on. Suggestions

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  • robwfwhite Nov 23, 2009

    It is a Rheem RAKA-024 JAZ, 10 Seer. I don't believe it is a heat pump as it says "air conditioner" on top. Could it have been modified regardless of the model? ... What does a heat pump look like vice a regular a/c unit?

  • robwfwhite Nov 23, 2009

    More on this ... First off, thanks for your replies. The unit is a RAKA-024 JAZ, Rheem Seer 10. I replaced the digital t-stat as I thought the guy I bought the house from hooked it up wrong, (as he did with most of the other renos he's done) but I have no experience with HVAC- other wiring yes.

    I've traced the wiring down to the furnace from my t-stat. There are 6 wires running to the stat into the wall, but only four come out the other side. Can you describe how the "C" terminal affects things?... Also I noticed both the "W" and "Y" wires being hook to the same terminal on the furnace. The "W" terminal has nothing hooked up to it, although the "C" terminal does.

  • D. Floyd Kolb
    D. Floyd Kolb May 11, 2010

    Are you sure that you don't have a heat pump unit that is heating your house. A heat pump is an airconditioner that works in reverse, the outdoor unit would then be running everytime you have acall for heat.



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Hi, If you have what is called a heat pump, the outdoor unit is supposed to run. It has a reversing valve which reverses the flow of refrigerant and the indoor unit becomes the condenser and the outdoor becomes the evaporator coil. Now, if you don't have a heat pump and the furnace is gas fired, then the control wiring or thermostat is calling for both to come on. Control wiring has to be touching together somewhere and bringing on both. Look over the exposed stat wire outside if you have a dog that may have chewed the wires, I have seen this happen. If all wiring looks good, then the stat is faulty and must be replaced. Make sure you don't have a heat pump first, as the fan, compressor, and all will run on heat and cooling. I hope this will solve you're problem, please let me know, I would like to hear back. Sincerely,

Posted on Nov 20, 2009

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  • Robert Horton
    Robert Horton Nov 20, 2009

    Hi, For a temp. solution only if it is gas, turn off the outdoor unit at the breaker. Heat pump leave on Until we get a solution.

  • Robert Horton
    Robert Horton Nov 24, 2009

    Hi, to tell the difference in a heat pump from a regular a/c is if the indoor unit is gas fired, the furnace. The outdoor unit looks the same and it should say some where on it Heat-Pump. The model number you gave me shows that it is a 2 ton unit. As far as the wire terminations, on the gas furnace, you only need 4 wires. The furnace is wired wrong . W to W, Y toY, R to R and G to G. The C is the common, just leave it connected to c.If you have 4 wires to the stat, you should have rh and rc which should have a red jumper wire connecting the 2 together. The red from the wall will connect to either one as they are together. Then W to W, Y toY, and G to G. The stat you have should be a regular central a/c Heat T-stat. So, I am sure it is a 2-ton gas/elect unit and the reason the outdoor unit is runnig, is they way it was wired to the furnace. You say there is another wire connected to the C at the furnace? You only need the 4 wires since you have 4 to the stat. Same as the stat, R to R, W to W Y to Y and G to G. forget the common. The out door unit stat wire if it is not a heat pump will have only 2 wires connected to it. If you have 7 to 8 it would be a heat pump. Please, just follow the way I have told you and I am sure it is a gas furnace if you have burners. Wire it like I said with the 4 to stat and 4 to furnace to the designated terminals, and the out door unit should not run in heat if it is gas. Take your time and you can do this. Let me know, Best of Luck and you will be up and running correctly. Shastalaker7

  • Robert Horton
    Robert Horton Nov 24, 2009

    Hi again, I looked this condensing unit up and it is showing it is not a heat-pump.Make sure the indoor blower unit is gas fired.

  • Robert Horton
    Robert Horton Dec 17, 2009

    Hi, I am assuming the unit may be on-line by this time and hope it is. I was doing follow ups and this one popped up! I looked back on some of the solutions that I and other techs offered you. I looked where you said it had 6 wires but only 4 were terminated? Here is how it should be terminated. As far as 2 wire yellow and white on the same is wrong! Red to R, Green to G with is indoor fan, white to w only and alone! Yellow to Y for cooling. Now you will have to wires coming in from the outdoor unit that supplies 24 volts to the contactor coil. White would go to the Y terminal, and the other to common or c.If you connect Y yellow to the w terminal, both heat and outdoor unit will be energized.If C wasn't being used, connect only one of the 2 wires coming in from condenser. I hope you are up and running by now. Happy holidays, Sincerely,



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