Question about Goodman GMS90703BXA Heater

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Goodman heats but defrosts turns on before desired temp.

After about 3 or 4 minutes the defrost will kick on and blow cold air in the house till the defrost cycle is done. then the heat kicks back on. any temperature under 32 degrees i have to run emergency heat . my house is insulated very well and this is a new 3 ton 14 seer heat pump ,furnace and heat strips. the cooling worked excelent but is this normal for the heating part?????

Posted by d_duncan64 on

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Lou Barta

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Yes. The defrost cycle of a heat pump is actually turning on your airconditioning to heat up the condenser to thaw it out. During this cycle your electric strip heaters "should" be adequate enough to compensate for the a/c being on. At about 30 - 34 degrees outdoor temp there is not enough heat in the air to to adequately heat your home with the heat pump only. Some technitions will use an outdoor thermostat to turn off the heat pump when it is under 34 degrees outside. If you are to cold when its under 34 degrees intall more electric strip heaters.. But if you do this your electric bill may go up significantly.
Welcome to the wonderful world of electric heat pumps (lol).
Good luck.

Posted on Mar 29, 2009

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