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This OEM replacement transformer (part number HT01BD209) is the factory-specified control circuit transformer for the Payne PA2PNB060000AB packaged air conditioning unit. The transformer steps down 120V line voltage to the 24V required by the thermostat, contactor coil, and control board. When it fails, the entire control circuit goes dead — the thermostat shows no response, the system won't call for cooling or heating, and no error codes are produced because the board itself has no power.
Compatibility: Engineered specifically for the Payne PA2PNB060000AB 5-ton packaged unit. Always verify your unit's data plate voltage requirements and VA rating before ordering to ensure proper fitment. Need help confirming compatibility? Our HVAC parts specialists verify fitment before you order — same-day shipping available on all in-stock OEM components.