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This OEM control transformer (part number HT01AW229) is the factory-specified replacement for the Carrier PH13PR06000GACAA packaged heat pump unit. The transformer steps down the 115/208/230V line voltage to a safe 24V AC signal that powers the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When this transformer fails, the system becomes completely unresponsive: the thermostat goes blank, the unit won't energize, and no calls for heating or cooling are answered.
Compatibility: Designed for the Carrier PH13PR06000GACAA packaged heat pump system. Cross-references include HT01AW229A. Also fits select Bryant and Payne units sharing the same 60VA 115/208/230V–24V transformer specification — verify your unit's data plate before ordering. Have questions about fitment? Our HVAC parts team confirms compatibility before you buy.