Question about Heating & Cooling
I just bought this unit, yesterday, from Lowe's and installed it in our 225 sq. ft. bedroom. I put a thermometer in front of the grill and it blowing air at about 50 Fdegrees. I set the conditioner at 64 degrees. it's lowest setting, but the room was actually 68 degrees when I awoke in the morning. I then checked the temp. of the air coming out of the conditioner and it was at 60 degrees, ten degrees warmer than the preceeding night. The outside air temp. was approximately 70 degrees, and the humidity was very high. I am ready to take the unit back, but thought I would see if there is an explanation as to why the output air temp was 50 degrees upon start up, but ten hours later could only get as low as 60 degrees. Is this normal, if so, I perhaps I need to get a 10000btu, or a different brand of 8000 btu??
Air conditioners rely on a difference in pressure between the "high side" and "low side" in order to perform. Of course, a/c's are designed to work in the heat. Having a cooler outdoor temp of 70 degrees probably is not sufficient to maintain adequate head pressure and will result in reduced cooling capacity. Also, since it was 68 in the morning in the room, it is possible that the indoor coil began to freeze up. Basically, you have a cold coil that you keep warm by moving air over it. If the air doesn't have enough specific heat (what your thermometer measures) it can allow the coil to get colder than 32 degrees and the condensate from all of your humidity will begin to freeze on the coil. My recommendation would be to check the a/c on a day that is 80+ degrees. If you have an avarage indoor temp of 70 degrees you should be able to look for the air coming out to be approximately 20-25 degrees colder than the air being sucked in.
Posted on Jun 12, 2008
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Posted on Jan 02, 2017
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