Frigidaire Air Conditioner Error Code AS

The AS code means the control board has detected a sensor failure. The sensor involved monitors temperature conditions inside the unit, such as evaporator or ambient temperature. When the sensor sends an out-of-range or absent signal, the unit displays AS and stops normal operation to protect itself from running without accurate temperature data.

Operating the unit while the AS code is active is not recommended. The air conditioner relies on sensor data to regulate cooling cycles and prevent conditions like freezing or overheating. Running it without a functioning sensor can lead to compressor damage or reduced efficiency. Power the unit off and schedule service before resuming use.

Unplugging the unit and restoring power may temporarily clear the display, but if the underlying sensor or wiring fault still exists, the AS code will return once the control board runs its diagnostics again. A power reset is not a fix for a failed sensor. The root cause needs to be diagnosed and repaired for the error to stay cleared.

Frigidaire's first recommended step for the AS code is to contact an Authorized Frigidaire Service Center. A technician will use a multimeter to test the resistance of the temperature sensor and check continuity through the wiring harness. If the sensor is out of spec, it gets replaced. If the wiring is damaged or a connector is corroded, those are repaired or replaced. In rare cases the control board itself is the fault.

Repair cost depends on which component has failed. A temperature sensor replacement is typically a low-cost part, often under $20, but labor from an authorized technician adds to the total. If the control board is the fault, parts alone can range from $50 to $150 or more depending on the model. Getting a diagnostic visit from an Authorized Frigidaire Service Center will give you an accurate estimate for your specific unit.