Carrier 42KLE39-E User Manual (English)

Questions and Answers:

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Donald SmithAug 18, 2025
What to do if the Carrier Air Conditioner compressor and outdoor fan won't start?
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  Melanie FryeAug 18, 2025
  If the compressor and outdoor fan of your Carrier Air Conditioner fail to start, there could be several reasons. First, there may be a power failure, in which case you should call the power company. Also, a fuse might be blown or a circuit breaker tripped, so replace the fuse or reset the circuit breaker. Other potential issues include a defective contactor (replace it), low line voltage (determine and eliminate the cause), incorrect or loose wiring (check the wiring diagram and rewire correctly), or a temperature setting that is too low (reset the temperature setting).
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sancheztroyAug 20, 2025
How to fix a Carrier 42KLE39-E when the compressor won't start but the outdoor fan runs?
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  William ForbesAug 20, 2025
  If the compressor on your Carrier Air Conditioner won't start but the outdoor fan is running, the issue could be due to faulty wiring or loose connections in the compressor circuit, so check the wiring and repair or correct as needed. Another possibility is that the compressor motor is burned out, stuck, or has an internal overload open, which would require replacing the compressor and determining the cause. Lastly, a defective run capacitor could be the problem, so consider replacing it.
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kkochAug 23, 2025
What to do if Carrier Air Conditioner unit doesn't beep when pressing the start button?
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  elizabeth57Aug 23, 2025
  If your Carrier Air Conditioner unit doesn't acknowledge the signal with a beep when pressing the start button, make sure the main switch is in the ON position. Also, the remote control batteries may be exhausted, so replace them. Ensure the remote control is pointed correctly at the indoor unit's receiver. Obstacles like curtains or walls could be blocking the signal, so remove them. Direct sunlight on the receiver or remote control can interfere, so avoid direct sun. Severe interference from an electromagnetic field might also obstruct the signal, so avoid sending signals near operating computers or household appliances.
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William BarreraAug 26, 2025
Why is the display not lit on my Carrier Air Conditioner remote after placing batteries?
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  kchanAug 26, 2025
  If the display on your Carrier Air Conditioner remote control is not lit after inserting batteries, the batteries may be exhausted or have the wrong polarity. Replace the batteries or check their polarity to resolve this issue.
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William CarrAug 27, 2025
Why does my Carrier Air Conditioner compressor run continuously?
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  Amanda RichardsonAug 28, 2025
  Your Carrier Air Conditioner's compressor might run continuously due to several reasons. The system may be undersized for the load, requiring you to decrease the load or increase the system size. Alternatively, the temperature setting might be too low, so try resetting it. A defective outdoor fan could also be the cause, so check for the source and replace if necessary. Other causes include air or non-condensable refrigerant in the system, which requires you to blow refrigerant, evacuate the system, and recharge it. Finally, check for restricted airflow or a dirty indoor section filter and clean the filter or remove any restrictions.
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Kimberly GonzalezSep 1, 2025
Why is the head pressure excessive in my Carrier 42KLE39-E Air Conditioner?
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  Rebecca ReynoldsSep 1, 2025
  Excessive head pressure in your Carrier Air Conditioner can stem from several issues. A dirty outdoor coil can cause this, so clean the coil. Also, a defective outdoor fan may be the problem, so replace it if necessary. Other potential causes include the refrigerant being overcharged (purge excess refrigerant), air or non-condensable refrigerant in the system (blow refrigerant, evacuate system and recharge), or a restriction in the outdoor section airflow (remove the restriction).
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Maria ParsonsSep 3, 2025
What causes low suction pressure in a Carrier Air Conditioner?
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  Jacqueline HenrySep 3, 2025
  Low suction pressure in your Carrier Air Conditioner can be attributed to several factors. It could be due to a low refrigerant charge, in which case you should check for leaks, repair them, and recharge the system. The indoor unit might be frosted. Low indoor air or short cycling may also cause this, so eliminate the cause and check if the fan is working. A restriction in the suction tube, such as a capillary or accurate restriction or ice clog, could be the reason, so locate and remove the restriction. Also, the refrigerant may need to be blown, the system evacuated, and then recharged.
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Jonathan PrestonSep 5, 2025
Why is the head pressure too low in my Carrier 42KLE39-E Air Conditioner?
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  Jerry UnderwoodSep 6, 2025
  Low head pressure in your Carrier Air Conditioner could be due to a low refrigerant charge, so check for leaks, repair them, and recharge the system. Alternatively, there might be a restriction in the liquid tube, which you should remove. A dirty air filter in the indoor section could also be the cause, so clear the filter.
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Christopher LewisSep 8, 2025
What causes excessive section pressure in Carrier 42KLE39-E?
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  Charles ParkerSep 8, 2025
  Excessive section pressure in your Carrier Air Conditioner can arise from a reversing valve that is stuck or has an internal leak, requiring replacement. It may also be caused by an internal pressure relief being open, so check for the source and eliminate it. Another reason might be overcharged refrigerant, in which case you should purge the excess refrigerant.

Carrier 42KLE39-E Specifications

General

Star Rating	3 Star
Power Supply	220-240V, 50Hz
Refrigerant	R32
Indoor Unit Noise Level	38 dB(A)
Outdoor Unit Noise Level	52 dB(A)
Type	Split AC
Heating Capacity	39000 BTU/h