Carrier 38KLE39-C - User Manual

Questions and Answers

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Sabrina RileyAug 18, 2025
What to do if the Carrier 38KLE39-C Air Conditioner compressor and outdoor fan won't start?
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  Christopher MarksAug 19, 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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James ButlerAug 20, 2025
How to fix a Carrier 38KLE39-C when the compressor won't start but the outdoor fan runs?
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  Whitney PayneAug 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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Anthony WongAug 23, 2025
What to do if Carrier 38KLE39-C Air Conditioner unit doesn't beep when pressing the start button?
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  Kathleen SchwartzAug 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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Michael BeckAug 26, 2025
Why is the display not lit on my Carrier 38KLE39-C remote after placing batteries?
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  boothjamesAug 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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Jonathan HughesAug 28, 2025
Why does my Carrier 38KLE39-C compressor run continuously?
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  Daryl LittleAug 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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Maria DelacruzSep 1, 2025
Why is the head pressure excessive in my Carrier 38KLE39-C Air Conditioner?
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  Marie SheppardSep 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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nicholsontraceySep 3, 2025
What causes low suction pressure in a Carrier Air Conditioner?
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  Kristen ScottSep 4, 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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Elizabeth ReyesSep 6, 2025
Why is the head pressure too low in my Carrier 38KLE39-C?
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  Sherri FosterSep 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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Maureen ThompsonSep 8, 2025
What causes excessive section pressure in Carrier Air Conditioner?
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  Troy TaylorSep 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.
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Victor LuceroSep 12, 2025
Why has the outdoor fan stopped or is cycling on overload in my Carrier 38KLE39-C Air Conditioner?
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  Timothy HodgesSep 12, 2025
  If the outdoor fan in your Carrier Air Conditioner has stopped or is cycling on overload, it could be due to a defective fan motor capacitor, which should be replaced. Loose leads at the fan motor could also be the problem, so check for the cause and eliminate it. Additionally, the fan motor might be burned out, requiring replacement, or the motor bearing could be seized, so check for the cause and eliminate it.

Summary

Precautions for Service & Maintenance

Safety Considerations

Important safety precautions for servicing air conditioning equipment.

What is not covered in Carrier warranty?

Details on conditions and failures not covered under the manufacturer's warranty.

Unit Models & Part Numbers

System Operating Limits

Cooling

Specifies operating temperature limits for cooling mode.

Heating

Specifies operating temperature limits for heating mode.

Main Power Supply

Lists voltage and frequency requirements for the main power supply.

System Safety Protection

6-1 For Heat Pump System

Details safety protection mechanisms for heat pump systems.

6-2 For Cool Only System

Details safety protection mechanisms for cool-only systems.

Part List of Indoor Unit

Evaporator Coil & Headers Subassy

Blower Deck Subassy

Blower

Evaporator Motor

Drain Pan Subassy

Main PCB

Room Sensor 530 ± 30 mm

Indoor Coil Sensor 530 ± 30 mm

Cabinet Subassy

Air Filter-Anti Bacteria

Wireless Remote Control

Electric Heater Subassy (Only For 42 KLE39-E)

Exploded View and Parts List of Indoor Unit (Cont.)

(B) Part List

Lists detailed part numbers for indoor unit components.

Blade

Part List of Outdoor Unit

Compressor C;W Grommets & Spacers

Lists compressor models with associated grommets and spacers.

Condenser Coil Subassy.

Condenser Motor

Electrical Box Subassy

Dual Capacitor

Lists various dual capacitor ratings and part numbers.

Contactor for Compressor

Starter for Compressor

Lists starter components for the compressor.

Reversing Valve & Electric Coil

Lists the reversing valve and its electric coil.

Accumulator

Sensor - Outdoor Coil

Wiring Diagram

Indoor Unit 42 KLE-H Series Heat Pump

Wiring diagram for indoor units of the 42KLE-H heat pump series.

Indoor Unit 42 KLE-C Series Cool Only

Wiring diagram for indoor units of the 42KLE-C cool-only series.

Indoor Unit 42 KLE39-E Cool;Electric Heat

Wiring diagram for indoor units of the 42KLE39-E cool/electric heat series.

Outdoor Unit 38 KLE-H Series Heat Pump

Wiring diagram for outdoor units of the 38KLE-H heat pump series.

Outdoor Unit 38 KLE-C Series Cool Only

Wiring diagram for outdoor units of the 38KLE-C cool-only series.

Field Electrical Connections Matching

Refrigeration Cycle

Heat Pump System

Diagram showing the refrigeration cycle for heat pump systems.

Cool Only System

Diagram showing the refrigeration cycle for cool-only systems.

Self-Diagnostic Function

14-1 Introduction

Introduction to the self-diagnostic function's importance.

14-2 Explanation of Self-Diagnostic Function

Explanation of how the self-diagnostic function works and displays errors.

14-3 Self-Diagnostic Function Description for Heat Pump Systems

Details self-diagnostic error codes for heat pump systems.

14-4 Self-Diagnostic Function Description for Cool Only Systems

Details self-diagnostic error codes for cool-only systems.

Emergency Operation of Air-Conditioner

Emergency Button:

Explains the use of the emergency button when the remote is inoperative.

Air Filter Cleaning

Removal of Air Filters for Cleaning:

Steps for removing air filters for cleaning.

Cleaning of Acrylic-Fibre Standard Filters:

Instructions for cleaning acrylic-fibre filters.

Periodical Checks

Indoor Unit

Recommended monthly, 4-monthly, and yearly checks for the indoor unit.

Outdoor Unit

Recommended monthly, 4-monthly, and yearly checks for the outdoor unit.

Trouble Shooting

Compressor and outdoor fan will not start

Troubleshooting steps for when the compressor and outdoor fan do not start.

Compressor will not start, but outdoor fan runs

Troubleshooting steps for when the compressor fails to start but the fan runs.

Compressor runs bur cycles on internal overload (other than normally satisfying thermostat)

Troubleshooting for compressor cycling on internal overload.

Compressor operates continuously

Troubleshooting steps for continuous compressor operation.

Excessive head pressure

Troubleshooting for excessive head pressure issues.

Head pressure too low

Troubleshooting for low head pressure.

Excessive section pressure

Troubleshooting for excessive suction pressure.

Suction pressure too low

Troubleshooting for low suction pressure.

Outdoor fan stopped or cycling on overload

Troubleshooting for outdoor fan stopping or cycling on overload.

When pressing start button, unit does not acknowledge signal with a beep.

Troubleshooting for unit not responding to start button signals.

When pressing stop button, unit does not acknowledge signal with a beep.

Troubleshooting for unit not responding to stop button signals.

When pressing any function button, the remote control shows the function requested on the display, but unit does not acknowledge signal receipt with a beep and does not carry out the function.

Troubleshooting for remote commands not being executed by the unit.

Air conditioner will not start.

Troubleshooting for the air conditioner failing to start.

Air conditioner is not supplying enough cooling.

Troubleshooting for insufficient cooling performance.

Air conditioner is not supplying enough heating.

Troubleshooting for insufficient heating performance.

Green LED is flashing

Troubleshooting for a flashing green LED indicator.

Carrier 38KLE39-C Specifications

General

Cooling Capacity (Ton)	1 Ton
Heating Seasonal Performance Factor (HSPF)	10
Refrigerant	R-410A
Compressor Type	Rotary
Type	Split
Outdoor Unit Noise Level	54 dB(A)