Question about Carrier 38CKC042 Air Conditioner

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My carrier air con unit is a problem

I put the indoor unit on hot and you hear the outside unit start up, starts to blow , then it cuts out within a minute to 2 minutes. What could be the problem. Many thanks

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There is a low voltage wiring problem. Make sure your t-stat wire is in the correct positions and that you have not removed the jumper wire at the t-stat. There should only be 2 control wires leaving the airhandler and going to the condenser unit outside. Unless it is a heatpump. One wire goes to common and the other goes to the Y terminal. W terminal is for heat. The unit will cut off if you have the unit calling for heat and cool at the same time.

Posted on Jan 05, 2009

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Posted on Jan 02, 2017

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Goodman minisplit flashes on pre. Def. Wont start


You have to try resetting the system. First turn the breaker off for the condenser and wait about 20 seconds. After you turn it back on the system should reset.


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Apr 07, 2015 | Goodman Heating & Cooling

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I have a ac central unit that has freon put in it, but it still blows out hot air inside the house.


Need a bit more info. Do you hear the compressor come on? Is your Tstat in the cooling mode? Shut it down for a minute and turn it back on. you should hear the indoor fan come on . outside fan come on and the compressor come on the sametime as the out door fan comes on.. Freon is just a gas that is used to exchange heat .

Jun 26, 2011 | Heating & Cooling

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Carrrier Central heat and air. Model 38CKC042300, Serial 4101E7590, Prosuct 38CKC042_ _ _301_ _. Woke up to hot house. Fan running but compressor outside isn't. Cool on flashing in thermostat window when I...


Unfortunately no, this is one of three things.
1. Compressor is worn and is starting to pull to many amps to operate. Can possibly be fixed by putting a hard start kit on the unit, but will have to be done by a technician.
2. Compressor has an internal short and will have to be replaced.
3. Fuses bad or under sized. Max fuse size is stated on information plate on outside unit.

Sorry to hear about your troubles and hope you can get it fixed soon!

Aug 15, 2010 | Carrier 38CKC042 Air Conditioner

1 Answer

Our air con runs, on heat, and after a time cuts out, blows cold and makes a sort of hissing noise (but not a real hiss) and then shuts down. It then restarts after a couple of minutes. Is this normal?


Yes.Think of a heat pump as a A/C in reverce in cool indoor coil is cold&outdoor coil is hot.Naw indoor coil is hot &outdoor coil is cold&fan is pulling in cold air from outside.its going to iceup& go into defrost cycle.If your unit has a timed defrost every 30,60,or90min.(witch ever yours is set for)Defrost control board checks a sensor on cond.coil,if it is frozen unit goes into defost.You will here a swishing noise,iis the reversing of refrigerant.you will also notice the outdoor fan is not operating&at termanation of defrost fan will blow out steem.the other metod is on demand defrost.when coil freezes unit defrosts.

Mar 02, 2010 | Heating & Cooling

1 Answer

Central air system blows cool air not cold and


your indoor unit is only circulating the air in the house. for your condensing unit. check your breaker in the electric panel. your contactor or your capacitor.

Aug 09, 2009 | Carrier Heating & Cooling

1 Answer

Uotside unit blowing cool air but hot on the inside


It sounds like you have a unit called a heat pump. When a heat pump unit is in cooling mode the outside unit blows hot air and the inside unit blows cold air. If the outside unit is blowing cold then the indoor unit is most likely blowing room temperature or warm air. It sounds like the thermostat could be controlling incorrectly or you could have a failed reversing valve which is the device that switches the unit from heating to cooling mode.

May 31, 2009 | Ruud UBHC Air Conditioner

1 Answer

Will Not Heat


On the outdoor unit the fan should not be running, on the indoor unit the fan should be running. If you then check the outdoor unit with fan not running, you should be able to hear clearly that the compressor is actually working. If this is all correct, it is possible that your fourway reverse valve is seeping and needs to be replaced.

Apr 15, 2009 | Fujitsu 18R1 Air Conditioner

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Only blows hot air inside


Set thr thermostat to AC instead of HEAT.

Dec 29, 2008 | Carrier 36KCARMS Air Conditioner

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Sounds like you either blew a transformer, have a bad circuit breaker or blew the main fuse in the outside disconnect. If the indoor unit is still blowing air (no matter what temperature) start looking at the power supply to the outdoor unit. From the circuit breaker, the power will go to a small box located within a few feet from the outside unit. This box will have either a lever on the side or you will be able to open the box and pull out the fuses. From this box the power goes to the condensor. The first thing you should do is to turn off the breaker to the outside unit. Flip it back on and if you have a call for cooling, after about 3 minutes the outdoor unit should start. If it does not, shut off power again to the unit by switching off the breaker, go outside and pull out the fuses in the disconnect box. Using a multi meter, check for continuity thru the fuses. If you have continuity, call your technician. If one or both fuses show no sign of continuity, replace the fuse(s). Make sure that the thermostat is working and sending a signal to the indoor air handler. You may be able to check this by turning the fan switch to "Fan" and see if the blower turns on. You may just have a bad thermostst. Caution should be used anytime you are near electrical components. If you do not have the skill-set required to test electrical equipment, leave it to a proffessional.

Sep 03, 2007 | Carrier 38CKC036 Air Conditioner

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