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This OEM Carrier step-down transformer (part# P201-35150) is the factory-specified replacement for the Carrier YAC60140YACX102AT. It steps incoming line voltage of 120/208/240 VAC down to a safe 12/24 VAC to power your system's control board, thermostat, and all low-voltage control circuits. When this transformer fails, you'll typically experience a completely unresponsive thermostat, a dark control board, or a system that won't respond to any commands — effectively a full system lockout.
Compatibility: Designed for the Carrier model YAC60140YACX102AT. Verify your existing transformer's VA rating and primary/secondary voltages against your unit's data plate before ordering. Cross-references: Totaline P201-35150, HCTY156D0LS11102. Have a fitment question? Our HVAC parts specialists are ready to confirm compatibility before you order.