Generic problem for all Air Conditioners
Intertherm heat pump
posted by dummy10 on Nov 28, 2007
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
Comment by dummy10, posted on 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
Best Solution
posted on Dec 01, 2007
WizIt 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.
Solution #2
posted on Nov 29, 2007
GuruFIRST 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.
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