Carrier package unit has two compressors but only one is freezing, several issues could be causing this. Common reasons include low refrigerant, airflow restrictions, dirty coils, faulty TXV, or compressor malfunction. If only half of the evaporator coil is icing up, it may indicate uneven refrigerant flow, a blocked filter, or a weak blower motor. Proper troubleshooting involves checking refrigerant levels, airflow, filters, and coil cleanliness. Learn how to diagnose and fix these issues to ke