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Emergency heat comes on everytime heat pump starts UPKA025JAS

My Ruud heat pump has a electick strip heater in the duct. Everytime the heatpum comes on so does the emergency heat. The wiring diagrams that I have been able to find do not show the correct wiring for a proper thermostat hook up. Does someone know how this shold be connected??

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  • coss985 Jan 31, 2009

    The t-stat is a heat pump type it is a Simple Comfort # 2200. It is 5 years old and has never been touched. The terminal blocks are as follows:
    B  O  W2  G  E  Y1  Y2
    The "B" has a blue wire
    The "O" is empty
    The "W2" has a white wire
    The "G" has a green wire
    The "Y1" has a yellow wire
    The "Y2" has nothing
    There is an Orange wire that is cut clean and does not look like it was ever attached. 
    The wiring diagram that came with the T-Stat is missing but from what I can see on line none of that makes sense. 
    I will say that I just moved into this house "it's my sister and i am down from Vermont helping her put her affairs in order (enough said) so I do not know the history but she says it has not been touched for several years. There is no way for me to tell how long the emergency heat has been coming on everytime the system calls for heat but I can not believe it is suppose to work that way? The Ruud site , unless I am looking in the wrong place, just plain SUCKS.  I know enough to be dangerous but I don't want to just start ripping out wires although if I new which one ran the emergency heat I would disconnect that as it is Florida after all!!!
    I appreciate any and all offers for help. Thank you so much for your help offered so far. 

  • mopar440man May 11, 2010

    what are your wire colors at the t-stat and control board or heat contactor do you have a heat pump tstat it will have a b/o term

  • Ken Bledsoe May 11, 2010

    Has someone did anything to thermostat? Or did problem just begin after working for the last few months?

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Most heat pumps do use the heat strip when they start untill the compressor gets the heat going. This keeps the air coming out of your vents warm as the system is ramping up.

Posted on Feb 24, 2009

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Your white wire is controlling the heat for your strips. while the blue is for the heat pump side of heat. But if you disconnect the white be sure to wrap tape around it so it doesn't contact any other wire. Would cause a short and you would loose a transformer.

Posted on Jan 31, 2009

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You have a heat pump (or the wrong thermostat). Let's assume you have a heat pump.

In air conditioning mode, it works like every air conditioner you have ever had, but...

In heat mode, it reverses its operation. Have you ever felt the air coming out of the outdoor unit of your A/C unit? It's hot, isn't it. And the air coming out of the indoor unit (out of the registers) is cold. Now for a heat pump to produce heat it simply runs the air conditioner in reverse and the heat comes out in the house and the cold is released outside. Neat, huh!

Here's the problem with heat pumps...when it is really cold outside the heat pump can't produce enough heat to heat your home. So it has an additional heat source called "Auxiliary Heat". This heat comes on automatically when the house doesn't get warm enough. The source of this heat is based on the region of the country you are in. North/Northeast generally have oil heat, other regions have gas, and still others have to use electricity to heat. In Texas, we usually use electricity as the supplementary heat on heat pumps. VERY EXPENSIVE!

Now the "Emergency Heat"...this is exactly as stated in Solution #2. This is manually turned on by YOU at the thermostat when your heat pump fails. This turns on the auxilliary heaters and turns off the heat pump (remember, the reverse air conditioner). Again, this can be quite expensive to run if your heat source uses electricity! Gas and oil may be cheaper. The emergency heat is only designed (normally) to keep the house livable (not comfortable) until the Heating Tech can get out to you and fix your heat pump.

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