Kenmore Air Conditioner Error Code AS

The AS code means the air temperature sensor has failed or is sending a signal outside the acceptable range. This sensor monitors the air temperature entering the unit so the control board can manage cooling cycles properly. When it fails, the unit may stop cooling correctly or shut down. Contact Kenmore at 1-800-4-MY-HOME (1-800-469-4663) to arrange a service visit.

Running the unit with an active AS fault is not recommended. Without accurate temperature data, the control board cannot regulate the compressor and fan correctly, which could lead to the unit running continuously or not at all. Continued operation in this state may put additional strain on the compressor. It is best to turn the unit off and schedule a repair.

Repair costs vary depending on whether the sensor, wiring harness, or control board needs replacement, plus the cost of a service call. Sensor replacements are generally the least expensive option, typically ranging from a modest parts cost plus labor, while a control board replacement can run significantly higher. Contact Kenmore support or a local authorized technician for a specific estimate based on your model.

Diagnosing this fault accurately requires measuring thermistor resistance and checking wiring continuity, which goes beyond basic homeowner maintenance. While a knowledgeable DIYer might inspect the sensor connector for visible corrosion or loose connections, replacing the sensor or control board typically requires a trained technician. Kenmore recommends calling 1-800-469-4663 for professional repair.

A power reset may temporarily clear the code, but if the underlying sensor fault remains, the AS error will return once the unit restarts and checks the sensor input again. A reset does not repair a failed thermistor or damaged wiring. Professional diagnosis is needed to resolve the fault permanently.