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This is the factory OEM replacement transformer (part number HT01AW229) for the Carrier HA1CJX060000AAAA packaged unit. The transformer steps down 120V line voltage to 24V to power the entire control circuit — including the thermostat, contactor coil, gas valve, and control board. When this component fails, the system will appear completely unresponsive: no thermostat display response, no contactor pull-in, and no ignition sequence whatsoever. It is often the first component to check when diagnosing a completely dead control circuit.
Compatibility: Engineered for the Carrier HA1CJX060000AAAA 5-ton packaged unit. Confirm your unit's control-circuit voltage requirements match 120V/24V 40VA before ordering. Our HVAC parts specialists are available to verify fitment — reach out before you order if you have any questions. Order today and enjoy same-day shipping on all in-stock parts.