OEM Carrier Control Transformer 50VA 120/208/240V–24V for Model YAC3680YAC306

This OEM control transformer (part number P201-35150) is the factory-specified replacement for the Carrier YAC3680YAC306 HVAC system. Its sole job is to step down high-voltage line power (120/208/240 VAC) to the safe 24V AC signal that drives your system's control board, thermostat, and all low-voltage switching circuits. When this transformer fails, the entire control circuit goes dark — nothing responds, the thermostat goes blank, and the system will not start in any mode. Replacing it with the correct OEM unit restores full system communication instantly.

• Specs: 50VA rating | Primary: 120/208/240 VAC | Secondary: 12/24 VAC | 60 Hz single-phase | CSA listed | Factory-matched to Carrier tolerances
• OEM vs Generic: This is a genuine Carrier/Totaline factory part (P201-35150), built to exact VA and voltage specifications. Generic transformers can run at reduced VA capacity, causing nuisance tripping of the internal thermal overload — especially under peak control-circuit load.
• Install difficulty: 2/5 — Shut off all power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdrivers, wire strippers, multimeter. Label all wiring connections before removal. Confirm secondary voltage reads 24V AC after installation before closing the panel.
• Warranty: 1-year OEM factory warranty included. Ships same business day from our stocked warehouse — no backorder delays.

Compatibility: Verified fit for Carrier model YAC3680YAC306. Always confirm the primary voltage matches your unit's supply voltage (120V or 208/240V) on the data plate before ordering. Have questions about fitment? Our HVAC parts specialists verify compatibility before you buy — contact us today.