OEM Carrier Control Transformer 40VA 120V/24V for Model YAC60140YACX401AC

This OEM step-down transformer (part number P201-35150) is the factory-specified replacement for Carrier YAC60140YACX401AC systems. The transformer converts 120V line voltage down to 24V to power the low-voltage control circuit — including the thermostat, contactors, and all 24V control board signals. When it fails, the entire control circuit goes dead: the thermostat loses power, the system won't respond to calls for heating or cooling, and no safety fuses are tripped. A failed transformer is one of the most commonly misdiagnosed HVAC faults.

• Specs: 120V primary | 24V secondary | 40VA rating | Class 2 transformer | Factory-matched OEM tolerances for reliable low-voltage control
• OEM vs Generic: This OEM unit is wound and rated to exact Carrier factory specifications, ensuring stable 24V output under full control-circuit load. Generic transformers often have looser VA tolerances, risking brownout conditions that can cause nuisance lockouts or board damage.
• Install Difficulty: 2/5 — Turn off power at the breaker and confirm zero voltage with a multimeter before touching any terminals. Tools needed: flathead and Phillips screwdrivers, wire strippers, multimeter, wire nuts or spade connectors. Photograph all wiring connections before disconnecting.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Orders ship same business day from our warehouse.

Compatibility: Designed for Carrier model YAC60140YACX401AC. Always verify primary voltage (120V), secondary voltage (24V), and VA rating on your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you place your order — contact us anytime.