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This OEM step-down transformer is the factory-specified replacement for the Carrier YAC2480YACX506T. It converts incoming line voltage (120/208/240 VAC) down to the safe low voltage (12/24 VAC) required to power your system's control board, thermostat, and all low-voltage accessories. When this transformer fails, the entire control circuit loses power — resulting in a completely unresponsive system, a blank thermostat display, or a unit that won't respond to any call for heating or cooling.
Compatibility: Designed as a direct OEM replacement for Carrier model YAC2480YACX506T. Always confirm your unit's supply voltage against the transformer's primary tap options (120/208/240 VAC) before installation. Questions about fitment? Our HVAC parts specialists are standing by to verify compatibility before you order — so you get the right part the first time.