Question about Carrier 38CKC042 Air Conditioner

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My A/C outside will not run, inside a fan is blowing air (a little cooler than the 82 degrees it is in here, but not cold). Unlike all the other posts I've read, my unit outside is not making any noise. I makes a click when I turn it on at the termostat 1 time and then nothing. All this started yesterday sometime, after the remains of TS Fay left us. Help. I tried the breaker thing and resetting the 240v box thing outside at the unit. Help.

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  • lynmarie74 Aug 25, 2008

    My unit is not Carrier...don't know how or why that is in my post. I have GrandAire.

    Also, what is the "panel". Is this anything i can see without taking anything apart. I don't want to risk my warranty. I just want to be on top of this and not get taken by the company. He and the builder already hate eachother.

    Thanks for any help you can provide. Also, did your transformer need to be replaced? Did you do it? What was the cost if you did?

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  • Master
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I am not an a/c expert but mine did this one time and it was the transformer I think it is called pull the panel off and look for wires burnt at connections also. BE sure you cut power off before doing this

Posted on Aug 25, 2008

  • TripleTauto
    TripleTauto Aug 25, 2008

    I replaced mine it was about 20 bucks the panel is the cover to your electrical connections what i found on mine was the wires on the end of transformer were basicilly burnt from being corroded and resistance building up.If it is under warranty you might be best to call him to look at

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Find a reputable HVAC contractor to do a room by room analysis with heat and cooling loads calculated and units sized and duct requirements and compare to what you have.

The air not being cold is not necessarily an indicator of anything malfunctioning. High efficiency units for instance don't produce cold air.

Since you have had someone look at it, the duct work may be collapsed which restricts air flow or uninsulated which warms up the supply air. Either one is a possibility. Any Cox Cable guys been stompin' around your attic lately? Wouldn't be the first time.

Usually, when the air coming out of the vents is not cold enuf it's because your freon level is low. Probably leaking, but they can usually recharge the freon and it will work for a while. Try another repair company and see if they can recheck the freon level.

We have a high efficiency unit and it produces cold air, so I don't know what previous poster is referring to. Air conditioners are supposed to blow cold air.

Sorry, to tell ya but it is normal if the outdoor temperatures are much below 45 degrees. Below 45 degrees there is little heat outdoors for the heat pump to grab to heat the home so it will run 24/7 and blow cool or cold air. Below 45 the temp of the air coming out the vent will decline and you will get no heat from the heat pump itself as you near freezing.

Your emergency heat or auxiliary heat is electric strip heat. But it only kicks in during normal operation if the temp in the house drops 3 degrees below the setting. (some tstats if can be 5 deg.) Otherwise the heat pump will blow cool or cold air the rest of the time if it is too cold out.

To prevent it from running all the time and blowing cold it is recommended if the temp outside is falling below 45 degrees you should just switch to the emergency heat setting, which shuts the pump outdoors off, and just heat with the electric.

But if there is no heat outside the heat pumps will blow cold. They are the cheapest and most efficient forms of heat but only as long as the outdoor temp is above that 45 deg..

I'm guessing that if you haven't experienced this you live in some place with moderate winter temperatures like in Northern Florida and rarely get very cold winter temps like the freezing you have seen there recently.

It will likely blow much warmer when the outdoor temp rises.


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