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Why can't my air conditioner work correctly?

Home Air Conditioner question.?

  • OK, so here is the deal..... I moved into a new house in Dec. It is three years old. The person whom lived here before me was never here. He told me himself, that he hardly ever ran the furnace or the air conditioner.When I had the house inspected, they found out that one of the vents in the crawl space was laying on the crawl space floor. I was told it was re attached and was fixed. The unit is made by Goodman. This house is a 1700 square foot house. The AC did not work at first since I live in KY and we have had some hot weather lately. I called the warranty people, they filled unit with freon as they stated it was empty. They ran dye into the system. It worked for three days, then back to blowing warm air. So they came back out, found out the compressor had gone out in it. Freon was still in the unit, and no leak detected thru the dye.They installed a new compressor (all under warranty). AC has been working fine since they did this repair three days ago. So I go to work today, I have the thermostat set for 65 degrees, come home and the house shows a temp of 68 and the AC is blowing cold air full blast. The temp outside when I came home was 88. Now the outside temp is 77 and my thermostat shows it is 66 in the house. (so it has now come down that much). Here is my question....is this normal, or does this house have a cheap *** Goodman AC system that is way to small for my house ? I cant afford this AC unit to run all the time throughout our hot Summers here in KY. Any ideas ?

  • Answer:

    The best way for the home owner to check the HVAC unit is to check the air temperature at the filter then check at one of the vents. If your system was perfect you will have 24 deg. difference between the two. But perfect is hard to get. If you have 18 to 20 deg. you are doing good. Your compressor should stay off for about 20 minutes. Good Luck

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The best way for the home owner to check the HVAC unit is to check the air temperature at the filter then check at one of the vents. If your system was perfect you will have 24 deg. difference between the two. But perfect is hard to get. If you have 18 to 20 deg. you are doing good. Your compressor should stay off for about 20 minutes. Good Luck

lloyd

Open a window and buy a serious whole house fan. Not a cheap wally world fan.

Scooter Power

If you are lucky it IS the AC. If not it could be that the house is not insulated at all. I would check that first.

Bill

You need on average 1 ton of cooling per 500-600 sqft. of living space. Other factors play into this ie: vaulted ceilings, windows towards the west, insulation in attic. So with 1700 sqft. you should have at least a 3 to 31/2 ton condenser. With a Goodman look at the model number on the condenser, look at the 4th or 5th number. It should say like 24,30,36,42. This will be your size of condenser, a 24 is a 2 ton. a 30 is a 21/2 ton and so on. You will always get a 18-20 TD (temperature drop) this is the temp difference between the supply and return in your house. So if it's 68 degree's in house you should be getting 48-52 degree's supply air coming out of vents. If your system was totally out of freon then odds are you have a leak. If they didn't see it at the condenser then they should of checked the A-coil for leaks. Hope this helps. Any more questions pls feel free to e-mail me

jusvicious

you should get 10 to 15 degree difference between return area and out put. remember this is a AC not a refrigerator. 88 outside you got 68 your doing good. i hate to see your electric bill as the unit had to be running all the time to get that low in that heat. close all blinds and check insulation and door seals to get it cooler. lowering costs it keeping it set at say 78 when not at home 72 when at home. i live in LA Calif. so i know heat and AC issues

Kim

Your thermostat shows it''s 68F. That is a big hint to the problem at this time. If you measured the temp in the house with a good thermometer then something is wrong with the thermostat. Also setting your temp to 68 degrees while it may feel good to you it is wasting a lot of power and further messing up our power grid, environment and fossil fuel consumption. It should not be below 78 to be green.

Steven

You need on average 1 ton of cooling per 500-600 sqft. of living space. Other factors play into this ie: vaulted ceilings, windows towards the west, insulation in attic. So with 1700 sqft. you should have at least a 3 to 31/2 ton condenser. With a Goodman look at the model number on the condenser, look at the 4th or 5th number. It should say like 24,30,36,42. This will be your size of condenser, a 24 is a 2 ton. a 30 is a 21/2 ton and so on. You will always get a 18-20 TD (temperature drop) this is the temp difference between the supply and return in your house. So if it's 68 degree's in house you should be getting 48-52 degree's supply air coming out of vents. If your system was totally out of freon then odds are you have a leak. If they didn't see it at the condenser then they should of checked the A-coil for leaks. Hope this helps. Any more questions pls feel free to e-mail me

jusvicious

Your thermostat shows it''s 68F. That is a big hint to the problem at this time. If you measured the temp in the house with a good thermometer then something is wrong with the thermostat. Also setting your temp to 68 degrees while it may feel good to you it is wasting a lot of power and further messing up our power grid, environment and fossil fuel consumption. It should not be below 78 to be green.

Steven

you should get 10 to 15 degree difference between return area and out put. remember this is a AC not a refrigerator. 88 outside you got 68 your doing good. i hate to see your electric bill as the unit had to be running all the time to get that low in that heat. close all blinds and check insulation and door seals to get it cooler. lowering costs it keeping it set at say 78 when not at home 72 when at home. i live in LA Calif. so i know heat and AC issues

Kim

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