OEM Carrier 40VA Control Transformer P201-35150 for Model YAC3680YAC308T

This OEM replacement transformer (part number P201-35150) is the factory-specified step-down transformer for the Carrier YAC3680YAC308T HVAC system. The transformer converts 120V line voltage down to the 24V AC signal that powers your entire control circuit — including the thermostat, contactor coil, and control board logic. When this part fails, the system goes completely silent: the thermostat displays nothing, the unit refuses to respond to any call for heating or cooling, and no diagnostic codes can be retrieved because the low-voltage circuit is dead.

• Specs: 120V primary input | 24V secondary output | 40VA rated | OEM factory-matched replacement | Foot-mount or chassis-mount configuration
• OEM vs Generic: This OEM transformer is wound and rated to exact factory specifications, ensuring proper VA capacity and thermal cutout protection. Generic transformers often underrate VA, causing premature burnout when multiple 24V loads are active simultaneously.
• Install Difficulty: 2/5 — Always shut off power at the disconnect and breaker before servicing. Tools needed: flat-head and Phillips screwdrivers, wire stripper, multimeter. Label all low-voltage wires before removal and verify 24V output with your meter before closing the panel.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier model YAC3680YAC308T. Always verify your existing transformer's input voltage, output voltage, and VA rating from the data plate or wiring diagram before ordering. Need help confirming fitment? Our HVAC parts specialists are standing by — order with confidence and get your system back online fast.