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This is the genuine OEM factory-authorized control transformer for the Carrier PH13NR02400GAEAA heat pump system. Part number HT01AW229, this foot-mounted transformer steps down line voltage (115V, 208V, or 230V primary) to the 24V AC secondary that powers the entire low-voltage control circuit — including the thermostat, contactor coil, and any safety switches. When this transformer fails, the result is total control circuit loss: the thermostat goes blank, the system won't respond to any call for heating or cooling, and fuses or breakers may trip. It is one of the first components to test when nothing works at all.
Compatibility: Engineered as a direct OEM replacement for Carrier model PH13NR02400GAEAA. This part also carries cross-reference designations HT01AW229A and is used across several Carrier, Bryant, and Payne platforms — always verify your unit's data plate and wiring diagram before ordering. Our team is available to confirm fitment. Order now — in stock and ships today.