Sirius Refrigerator Error Code AL

AL indicates that the control board has detected an open or short circuit in the ambient thermistor, the sensor that measures the room temperature around the refrigerator. This fault is detected either at startup or during normal operation. The refrigerator will continue to cool normally, but the low ambient process, which adjusts operation in cold environments, will not function until the fault is resolved.

Start by checking the ambient thermistor's resistance with a multimeter and comparing it to the thermistor value table for your unit. Also inspect the wiring harness and connectors between the sensor and the control board for damage, corrosion, or loose connections. If the sensor resistance is out of specification or the circuit is open or shorted, the thermistor will need to be replaced. If the sensor and wiring both test correctly, the control board may require further evaluation.

A power reset may temporarily clear the AL code from the display, but if the ambient thermistor circuit is still open or shorted, the code will return when the control board checks the sensor again at startup or during operation. A lasting repair requires either fixing the wiring connection or replacing the faulty thermistor.

Yes, the control board is designed to continue operating normally when the AL code is present. The primary cooling functions, including compressor operation and temperature control inside the refrigerator and freezer, are not affected. The only capability lost is the low ambient adjustment process, which is relevant mainly for units operating in cold garages or similar spaces.

The AL code is not a safety hazard. The refrigerator continues to cool and operate normally with this fault present. It does indicate a component failure that should be addressed, particularly if the unit is installed in a location that experiences cold ambient temperatures, since the low ambient compensation will not be active until the sensor is repaired.