Question about Carrier DCA121R Air Conditioner

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I have a Carrier DCA121R window A/C unit 12,000BTU. Whenever the compressor turns on the lights in the room blink and the compressor makes a noise on and off on and off... I have tried taking it apart and cleaning it to no avail... Any ideas?

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Check the max amp load of unit, ur breaker mite be rated to low

Posted on May 08, 2010

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Carrier 2000ss will not turn on. Checked fuses and they are okay.


Inside the outside unit is a pcb with fault diagnosis lights on. It could be anything from a weak start capacitor to a compressor fault or even short of gas. See what lights are on and check the manual

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I just purchased this portable air conditioner. I have a few questions about its operation and intimation. First, my window is a vertical sliding window that is about 55u inches tall. Do u have anything...


LG does not currently have an extender panel. However, call Vance Baldwin/Encompass at 1-866-779-7906, as they may can help you with that.

As far as noise is concerned: Generally speaking, most noises heard from the air conditioner are normal sounds of operation. Most of the time, noises are muffled during the day by activity in the home, but heard at night when it is more quiet.

Vibrating Noise? This is most likely the result of improper installation. Check that the unit is secured properly in the unit. Make sure the filter and the front grille are attached properly.

Hissing/Gurgling Noise? At the ON/OFF operation is caused by the refrigerant flowing inside the air conditioners sealed system. THIS IS NORMAL. This sound is a little louder for 2~3 minutes when the unit is first turned on. This is the sound of the compressor start-up. THIS IS NORMAL.

Beeping sound when control settings are selected/changed? THIS IS NORMAL. This noise is a signal that the control panel settings have been changed.

Pinging Noise? THIS IS NORMAL. This is the result of moisture in the base pan being picked up by the fan (called a slinger fan) and thrown against the condenser. This helps to discharge the heat and make the unit cool more efficiently.

Is the unit installed in an enclosed are? A unit enclosed by many walls is likely to produce more noise as the sound waves will be reflected and echoed.

Once the room temperature is met, the compressor should turn off automatically. But, the fan may run for several more minutes.

I hope this helped you. Thanks for choosing FixYa.

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Carrier Compressor Issues?


When you shut it off and back on it slugged the compressor if you turn it off and back on before the pressures equalize between the high and low sides it will slug the compressor and it will not run should let sit for five minutes or so before restarting. The humming is either the compressor making noise usually common for the compressor to make some noise or the fan motor bearings are getting bad on the outside unit. If the unit works normal probably not much you can do till it breaks if it is the compressor it is more economical to replace the whole unit if it is just the fan motor it is worth changing. You could take an amp draw on the fan motor and the compressor to see if the are within the limits on the name plate of the outside unit.

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1 Answer

Not turning on


Hi

Try to reset the unit by disconnecting the power supply for 10sec. and operate the unit. If it wont work replace your Room Air and Coil Thersmistor or test the thersmistor with mulitester. The resistance reading of thermistor is 10 kilo ohms @25deg. C room temp. If it is shorted or open the unit wont operate.

Hope this can help :)



Dec 30, 2008 | Carrier 36KCARMS Air Conditioner

1 Answer

Won't turn on


The unit in your back yard is the outside half. The one that blows room temp air is the inside half.

The outside half is not working. No compressor, no fan. That is a problem with the power. You will find the bad parts very close to where the power wires go into the outside half. It might be a bad relay that connects both the fan and compressor to the power. It might be a 3 terminal capacitor. It might be burnt wires.

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