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This genuine OEM Carrier transformer (part number HT01BC701) is the factory-specified replacement for the Carrier PY3GEAA60130AA packaged rooftop unit. This heavy-duty, high-VA transformer steps down the 460V primary supply voltage to 230V secondary to power critical internal components and sub-circuits within the unit. When this transformer fails, the result is typically a complete loss of control voltage — the system will not respond to the thermostat, no components will energize, and the unit will appear entirely dead. Confirming transformer failure with a multimeter (checking secondary output voltage) before ordering is recommended.
Compatibility: Designed for the Carrier PY3GEAA60130AA commercial packaged rooftop unit. Also compatible with select Carrier, Bryant, and Payne packaged units, RTUs, and heat pumps sharing the same transformer specification — always verify your unit's data plate voltage and VA requirements before ordering. Not sure if this is the right part? Our HVAC parts specialists are standing by to confirm fitment before you purchase.