Carrier DesertMaster 50TJM User Manual (English)

Questions and Answers:

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bbellAug 12, 2025
What to do if Carrier DesertMaster 50TJM Air Conditioner compressor won't start but condenser fan runs?
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  Kirsten GeorgeAug 12, 2025
  If the compressor in your Carrier Air Conditioner won't start but the condenser fan runs, several issues could be responsible. There might be faulty wiring or loose connections in the compressor circuit; check the wiring and repair or replace it as needed. The compressor motor could be burned out, seized, or have an internal overload open; determine the cause and replace the compressor. A defective overload can also prevent the compressor from starting; determine the cause and replace it. The compressor might be locked out; determine the cause for the safety trip and reset the lockout. Finally, one leg of the 3-phase power could be dead; replace the fuse or reset the circuit breaker and determine the cause.
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matthewadamsAug 15, 2025
Why does my Carrier DesertMaster 50TJM compressor operate continuously?
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  Crystal RodriguezAug 16, 2025
  If the compressor operates continuously, several factors could be the cause. A dirty air filter can restrict airflow; replacing it is a simple solution. The unit might be undersized for the cooling load, requiring you to either decrease the load or increase the unit size. Check that the thermostat isn't set too low, and reset it if necessary. A low refrigerant charge or air in the system can also cause this issue; locate and repair any leaks, then recharge the system, or recover the refrigerant, evacuate the system, and recharge. Lastly, a dirty or restricted condenser coil can impede performance; clean the coil or remove any restrictions.
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lozanopaulAug 19, 2025
How to troubleshoot a Carrier DesertMaster 50TJM Air Conditioner when the compressor and condenser fan will not start?
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  Kevin RamirezAug 19, 2025
  If your Carrier Air Conditioner's compressor and condenser fan won't start, it could be due to several reasons. First, check for a power failure and call the power company if needed. A blown fuse or tripped circuit breaker can also prevent starting; replace the fuse or reset the circuit breaker. Other potential causes include a defective thermostat, contactor, transformer, or control relay, which would require component replacement. Insufficient line voltage or incorrect wiring could also be the issue; determine the cause and correct it, or check the wiring diagram and rewire correctly. Finally, ensure the thermostat setting isn't too high; lower it below room temperature.
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chelsea49Aug 27, 2025
Why does my Carrier DesertMaster 50TJM Air Conditioner compressor cycle too often?
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  Lynn TaylorAug 27, 2025
  If your Carrier Air Conditioner's compressor cycles more frequently than normal, it could be due to several reasons. The system may have a refrigerant overcharge or undercharge, requiring you to recover the refrigerant, evacuate the system, and recharge it to the nameplate value. A defective compressor can also cause this issue, so replace it and determine the cause. Other potential causes include insufficient line voltage, a blocked condenser, or a defective overload; determine the cause and correct it, or replace the component. A defective thermostat or a faulty condenser-fan motor can also lead to cycling; replace the thermostat or motor. Finally, a restriction in the refrigerant system could be the problem; locate and remove the restriction.
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Megan RuizAug 31, 2025
What causes excessive head pressure in a Carrier DesertMaster 50TJM?
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  April QuinnAug 31, 2025
  If your Carrier Air Conditioner has excessive head pressure, several factors could be the cause. A dirty drier filter or condenser coil can restrict airflow, so replace the filter or clean the coil. The system might be overcharged with refrigerant, requiring you to recover the excess refrigerant. A faulty TXV can also cause this issue; check the TXV bulb mounting and secure it tightly to the suction line, or replace the TXV if it's stuck open or closed. Air in the system can also lead to high head pressure; recover the refrigerant, evacuate the system, and recharge. Finally, restricted condenser air or air short-cycling can contribute to the problem; determine the cause and correct it.
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ykingSep 3, 2025
What causes excessive suction pressure in my Carrier Air Conditioner?
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  Laurie MathisSep 3, 2025
  If your Carrier Air Conditioner has excessive suction pressure, it could be due to a high heat load; check for the source and eliminate it. Another potential cause is a faulty TXV; check the TXV bulb mounting and secure it tightly to the suction line, or replace the TXV if it's stuck open or closed. Additionally, the system might be overcharged with refrigerant, requiring you to recover the excess refrigerant.
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Amy VegaSep 7, 2025
Why is the head pressure too low in my Carrier DesertMaster 50TJM?
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  George BrownSep 7, 2025
  If the head pressure in your Carrier Air Conditioner is too low, it could be due to a low refrigerant charge; check for leaks, repair them, and recharge the system. Another possibility is a restriction in the liquid tube; remove the restriction.