Heat pump blows out cold air

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Old 02-14-04, 09:42 PM
champ98
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Heat pump blows out cold air

I have an Aire-Flo heat pump that is two years old. I have emergency heat, a gas furnance, that kicks in at 26 degrees and then shuts off the heat pump. Here's my question: When the heat pump is running, for the first 15-20 minutes it blows out cold air and after that it starts blowing out warm air. Is it normal for it to be blowing cold air for that long before blowing out warm air? This is my first heat pump so I'm not real familiar with them.
 
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Old 02-15-04, 05:38 AM
KField's Avatar
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You should probably measure the temperature at the register to determine what it really is. If it is between 85 and 90 degrees F. it isn't considered cold by heat pump standards. That is cold by gas or oil furnace standards or even electric backup standards but not heat pump. Let us know the temp and we'll proceed from there.

Ken
 
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Old 02-15-04, 08:50 AM
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Also in this 15 -20 minutes go feel the big line at the outdoor unit and see if it is hot or just warm.
What is your set up if the heat pump goes into defrost. What warms the air ? ED
 
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Old 02-21-04, 08:05 AM
blindrid
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With gas backup there are a couple factors when to lock the furnace out and run the HP. One is the thermal balance point-that is the temp that the HP cannot keep up with the heating requirements of the house (colder it gets the the greater your heat loss). Second one is the economic balance point. That is the point when it is cheaper to use natural gas backup than the HP. I'm just guessing that maybe your HP BTU capacity at lower temperatures is pretty close. You don't say whether or not the cooler supply temp is at colder temps outside or all of the time. Please keep in mind that HP's supply air is cooler and doesn't supply "fanny warming" heat.
 
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