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Intertherm heat pump

I have a intertherm heatpump that has the heat strips located in the outside unit. The heat pump works ok until the temp gets around freezing then not enough heat to hold the thermostat setting. I suspect the strips should be helping the heat pump but is not. I can manually turn on the emergency heat and get hot air. also there is a cycle when the heat pump blows ice cold air for about 2 minutes while in the heat mode. Hope yoy have some advice. Thanks

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  • dummy10 Dec 01, 2007

    Both replies were right on the money. The unit is a modular home outside package. The thermostat was wired wrong, not allowing the heat strips to kick in to assist the heat pump. Also the installer didn't install the outdoor thermostat to regulate the auxillary heat strips. I rewired per thermostat wiring diagram and placed an outdoor thermostat to turn off the strips at 40 degrees. Everything seems to be working ok. Thanks for the good info

  • buster69 Jan 14, 2013

    Is there any quit fix or how much does this cost ?

  • Anonymous Mar 13, 2014

    Heat pump blows cold air

  • Anonymous Mar 13, 2014

    Heat pump blows cold air

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FIRST YOUR OUTSIDE UNIT PROVIDES HEAT BY USING A REVERSING VALVE TO CHANGE THE REFRIGERANT FLOW.THERE IS NO HEAT STRIPS OUTSIDE SECOND YOUR EMERGENCY HEAT TURNS ON ELECTRIC ELEMENTS INSIDE YOUR AIRHANDLER UNIT.IT SOUNDS LIKE SOMEONE HAS WIRED YOUR UNIT WRONG OR HAS THE THERMOSTAT SET IMPROPERLY.WHEN THE HEAT PUMP CANNOT SATTISFY THE SETPOINT THE THERMOSTAT IS SUPPOSED TO TURN ON YOUR ELEC. HEAT UNTILL THE LOAD HAS BEEN REACHED AND THE HEAT PUMP CAN CONTINUE TO MAINTAIN IT.

Posted on Nov 29, 2007

  • buster69 Jan 14, 2013

    What does this cost ?

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I have a Intertherm heart pump that the compressior is good on except the cinnection to it keeps shorrting out If you have an idea on repairing, SU

Posted on Oct 20, 2008

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It sounds like you have a packaged unit for modular or manufactured housing. If this is the case I have noticed that they have a outdoor thermostat wired in series that does not allow the heat strips to come on unless it is satisfied at around 55 degrees. Remember this is inside the unit so it could be much colder outside. If this is not the case you may have a defrost problem, either in the defrost board or defrost sensor.

Posted on Dec 01, 2007

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Whne the strips are on, the T-stat displays "aux-heat" to indicate the strips are in operation.

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When the HP is not able to keep up with the demand for heat then the heat strips come on, but they typically come on only when the room temp has gotten well below the thermostat setting.

In that situation it would be normal to see indoor temps at 63 degrees when the T-stat is set on 70.

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