Frigidaire  Window Air Conditioner  with Heater Error Codes

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. You can also search for owner's manuals and find window air conditioner replacement parts

Check out our window air conditioner error code charts for information on a different Frigidaire model or another brand of window air conditioner.

Error Code Condition Check/Repair Shop Parts
ES Evaporator temperature sensor failure 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.
Evaporator temperature sensor, Wire harness, Electronic control board
AS Ambient temperature sensor failure 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.
See the repair guide to fix it yourself
Ambient temperature sensor, Wire harness, Electronic control board
HS Air outlet temperature sensor failure 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.
Air outlet temperature sensor, Wire harness, Electronic control board
OS Outdoor temperature sensor failure 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.
Outdoor temperature sensor, Wire harness, Electronic control board
CS Condenser temperature sensor failure 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.
Condenser temperature sensor, Wire harness, Electronic control board