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Heating & Cooling
Frigidaire window air conditioner with heater
These error code explanations can help you diagnose a problem with your Frigidaire window air conditioner/heater. For repair how-to help, visit the PartsDirect repair help section, which includes repair help for window air conditioners, major appliances, lawn and garden equipment, garage door openers, vacuum cleaners and more. Search for your model number to find a complete list of replacement parts for your window air conditioner.
Error Codes
Error Code
ES
Condition
Evaporator temperature sensor failure
Check / Repair
Unplug the air conditioner and check the wire harness connections on the electronic control board. Examine the electronic control board for damage. Check for a pinched or broken wire in the evaporator temperature sensor wire harness. Replace the evaporator temperature sensor if it's defective.
Possible Parts Required
Evaporator temperature sensor, Wire harness, Electronic control board
Error Code
AS
Condition
Ambient temperature sensor failure
Check / Repair
Unplug the air conditioner and check the wire harness connections on the electronic control board. Examine the electronic control board for damage. Check for a pinched or broken wire in the ambient temperature sensor wire harness. Replace the ambient temperature sensor if it's defective.
Possible Parts Required
Ambient temperature sensor, Wire harness, Electronic control board
Error Code
HS
Condition
Air outlet temperature sensor failure
Check / Repair
Unplug the air conditioner and check the wire harness connections on the electronic control board. Examine the electronic control board for damage. Check for a pinched or broken wire in the air outlet temperature sensor wire harness. Replace the air outlet temperature sensor if it's defective.
Possible Parts Required
Air outlet temperature sensor, Wire harness, Electronic control board
Error Code
OS
Condition
Outdoor temperature sensor failure
Check / Repair
Unplug the air conditioner and check the wire harness connections on the electronic control board. Examine the electronic control board for damage. Check for a pinched or broken wire in the outdoor temperature sensor wire harness. Replace the outdoor temperature sensor if it's defective.
Possible Parts Required
Outdoor temperature sensor, Wire harness, Electronic control board
Error Code
CS
Condition
Condenser temperature sensor failure
Check / Repair
Unplug the air conditioner and check the wire harness connections on the electronic control board. Examine the electronic control board for damage. Check for a pinched or broken wire in the condenser temperature sensor wire harness. Replace the condenser temperature sensor if it's defective.
Possible Parts Required
Condenser temperature sensor, Wire harness, Electronic control board
Symptoms for window air conditioners
Choose a symptom to see related window air conditioner repairs.
Main causes: dirty air filter, air conditioner is too small for the room, temperature set too cold, control failure…
Main causes: turning the air conditioner off and the back on too quickly, dirty or restricted condenser coil, compressor…
Main causes: lack of electrical power, bad electronic control board, wiring failure, bad temperature sensor…
Main causes: clogged condensate drain, air conditioner not leveled properly, leaky window air seals …
Main causes: clogged drain hole, air conditioner not leveled properly…
Main causes: bad compressor, lack of refrigerant, bad compressor start relay, electronic control board failure…
Repair guides for window air conditioners
These step-by-step repair guides will help you safely fix what’s broken on your window air conditioner.
How to replace a window air conditioner user interface control board
Control buttons or lights on the user interface control board can stop working. This repair guide shows how to replace i…
Repair time and Difficulty
30 minutes or less
How to replace a window air conditioner condenser fan
If the condenser fan blade is broken or the condenser fan motor won’t run, you can replace the broken parts yourself by…
Repair time and Difficulty
90 minutes or less
How to replace a window air conditioner ambient thermistor
If your window air conditioner isn’t cooling properly, it might need a new ambient thermistor. You can replace it yourse…
Repair time and Difficulty
45 minutes or less
Articles and videos for window air conditioners
Use the advice and tips in these articles and videos to get the most out of your window air conditioner.
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