Rheem RA1418AJ1NA User Manual (English)

Questions and Answers:

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Kevin SanchezAug 22, 2025
How to fix insufficient cooling in Rheem RA1418AJ1NA Air Conditioner?
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  Sabrina McgeeAug 22, 2025
  Insufficient cooling in your Rheem Air Conditioner can stem from several issues. The unit might be improperly sized, requiring a recalculation of the load. There could be improper indoor airflow; check to ensure it's approximately 400 CFM per ton. An incorrect refrigerant charge is another possibility; charge the system per the procedure attached to the unit service panel. Also, air, noncondensibles, or moisture in the system can cause this problem, requiring refrigerant recovery, evacuation, and recharge, along with the addition of a filter drier. Finally, a faulty ID TXV could be the culprit, necessitating replacement.
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Brittney MillsAug 25, 2025
Why are the registers sweating in my Rheem Air Conditioner system?
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  James HuffAug 25, 2025
  If the registers in your Rheem Air Conditioner system are sweating, it's likely due to low indoor airflow. Try increasing the blower speed or reducing any restrictions in the airflow. Replacing the air filter can also help.
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stacygoodwinAug 25, 2025
How to troubleshoot a Rheem RA1418AJ1NA Air Conditioner that will not run?
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  christine29Aug 26, 2025
  If your Rheem Air Conditioner unit won't run, several factors could be the cause. It could be due to a power outage or loose electrical connection, so check the voltage at the line voltage connections. The thermostat might be out of calibration, so try resetting it. A blown fuse or tripped breaker can also prevent the unit from running, so replace the fuses or reset the breaker. Other potential issues include a defective transformer (check the wiring and replace if necessary), an open high-pressure control (reset it), an open low-pressure control, a defective control board (check diagnostic codes), or miswiring of communications (check communication wiring).
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Timothy OrtizAug 27, 2025
What to do if Rheem RA1418AJ1NA compressor short cycles?
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  houstonleslieAug 27, 2025
  If your Rheem Air Conditioner's compressor is short cycling, several factors could be responsible. First, check the voltage at the compressor terminals; it must be within ± 10% of the nameplate marking when the unit is operating. A defective overload protector could also be the cause, requiring replacement. Lastly, a refrigerant undercharge might be the issue, in which case you should add refrigerant.
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Kendra CunninghamAug 27, 2025
What causes Rheem RA1418AJ1NA Air Conditioner outdoor fan to run but compressor not?
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  Rodney ParkerAug 27, 2025
  If the outdoor fan of your Rheem Air Conditioner is running but the compressor isn't, it could be due to several reasons. A defective run or start capacitor may be the cause, requiring replacement. The contactor could also be defective and need replacement. Check for correct voltage at the compressor and ensure all connections are tight, as a loose connection could be the problem. The compressor might be stuck, grounded, have an open motor winding, or an open internal overload; wait at least 3 hours for the overload to reset, and if it remains open, replace the compressor. A low-voltage condition could also be the cause, in which case you should add start kit components.
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Lisa ParksAug 28, 2025
Why does my Rheem Air Conditioner have high head pressure in cooling mode?
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  Trevor ClarkAug 29, 2025
  High head pressure in cooling mode for your Rheem Air Conditioner can result from a few issues. The outdoor coil might be dirty, so cleaning it is recommended. Refrigerant overcharge could also be the problem, requiring a correction of the system charge. If the outdoor fan isn't running, it needs repair or replacement. Finally, air or noncondensibles in the system could be the cause, requiring refrigerant recovery, evacuation, and recharge.
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Ronald HernandezAug 30, 2025
Why is my Rheem RA1418AJ1NA's indoor coil iced?
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  stephanie80Aug 30, 2025
  An iced indoor coil, accompanied by low vapor and a cool compressor in your Rheem Air Conditioner, can be attributed to several factors. Low indoor airflow could be the culprit; increase the blower speed or reduce restrictions, and replace the air filter. If you're operating below 65°F outdoors, consider adding a Low Ambient Kit. Moisture in the system can also lead to this issue, requiring refrigerant recovery, evacuation, recharge, and the addition of a filter drier. Lastly, a closed ID circuit might be the cause, necessitating repair or replacement of the ID coil.
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Megan HartAug 31, 2025
What causes high vapor pressure in Rheem RA1418AJ1NA?
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  Theresa AlexanderAug 31, 2025
  High vapor pressure in your Rheem Air Conditioner can be caused by an excessive load, so recheck the load calculation. It may also be due to a defective compressor, which would require replacement.
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thomas21Sep 2, 2025
What causes high head and low vapor pressures in Rheem RA1418AJ1NA Air Conditioner?
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  Katrina CrawfordSep 2, 2025
  High head pressure combined with low vapor pressures in your Rheem Air Conditioner typically indicates a restriction in the liquid line, expansion device, or filter drier. Remove or replace the defective component. It can also be caused by a bad TXV, which needs to be replaced.
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Miss Maria GouldSep 3, 2025
What does low head and high vapor pressures mean for Rheem Air Conditioner?
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  Rachel BaldwinSep 3, 2025
  Low head pressure coupled with high vapor pressures in your Rheem Air Conditioner can point to a bad TXV, which requires replacement. Another potential cause is a bad compressor, which would also need replacing.

Rheem RA1418AJ1NA Specifications

General

Refrigerant	R-410A
Voltage	208/230V
Phase	1
HSPF Rating	Not Applicable
Frequency	60 Hz
Power Supply (V/Hz)	208/230V, 60Hz
Type	Air Conditioner
Cooling Capacity	18000 BTU/h
SEER Rating	14 SEER
Energy Efficiency Ratio (EER)	11.5 EER