I understand this questions or this kind of question has been asked before, but please help. I have a Carrier Heating & Cooling unit. It is about 2 years old. Besides that fact that the thermostat is so confusing. The air con was working fine until yesterday. We had it on cool mode at 72 or so. Anyway, now, it turns on, you can hear it when you stand next to it (downstairs in the basement), and the fan is blowing outside of the house also. However, it is not blowing cold air or any air that I can tell. Maybe some. What is the problem, to be so short (sorry)? What will it cost to have a man come look at it? We have a friend of a friend that can come first of next week. He possibly will save us initial money for service call. But anyway, whats our next step? Please help, 90 degrees here and the wife is getting restless. Thanks

Terry L. Burks

 

Sounds like the compressor out side is not comeing on and running . Check that out if you can. If it dont come one dont let it run .Have just the fan inside on and have some one look at it Cost is so different all over hard to say.



ED

 

Have you changed the airfilter lately?

 

yes i changed it and it still comes on inside and out. but no air output. recently as yesterday i turned the thermostat on 50 to get it to kick on. it came on but went off after 10 minutes. help!!!!

 

If it's running but you feel no air it's got some type of restriction. Could be returns are blocked, supplys are closed, could very well be that the inside coil is frozen. While it's running "the indoor and outdoor sections" and you don't feel any air blowing look at the copper lines going into the duct just above the furnace, is the fat insulated one showing any signs of frost or ice?

Not knowing the rates where you live I'd guess at $50 - $90 for a service call.

 

There is some condensation above the furnace where the coils are inside. I will look and feel for obstructions. Also, can I let it thaw out and then try to run it again? Why did it freeze up?

Terry

 

If the filter is clean the coil clean the blower clean and running call a hvac tech its in the unit or your low on freon.
No dont run it that way, you can run just fan on inside


ED

 

set the thermostat to the highest setting while in the cooling mode and place the fan ON. This will defrost the coil, and the basement MAY get a little wet when it melts... Let it run this way for a few hours...Then have someone lower the thermostat setting to 68. Observe the outdoor unit when it starts, feel the two copper refrigeration pipes. The insulated one should be good and cold, to the point of sweating, and the one about the size of your pinky should be warm. To see if its removing heat(doing work) , feel the discharge air over the outdoor unit...it should be hot like a warm air furnace in the winter. When a unit is low on freon, the insulated line will be warm (high superheat) at first, till it creates a frozen condition in the coil to prevent it from picking up heat, then it will gradually start freezing the line back to the compressor, unless it is too low on gas, then you'll just get no cooling but lots of air flow. The loss of air flow is due to the ice on the indoor coil blocking the air path to the registars.