OEM Carrier 50VA Control Transformer P201-35150 for Model YAC36100YAC107

This is the genuine OEM step-down transformer for the Carrier YAC36100YAC107 packaged unit. The transformer converts 120/208/240V line voltage down to a safe 12/24V AC signal that powers your system's control board, thermostat, and all low-voltage control circuits. When this transformer fails, the entire control circuit goes dead — your thermostat becomes unresponsive, the system won't call for heating or cooling, and no safety or diagnostic functions can operate. If your unit has 24V present at the transformer primary but nothing at the secondary, this is your part.

• Specs: 50VA rating | Primary: 120/208/240 VAC multi-tap | Secondary: 12/24V AC | 60 Hz | Single-phase | CSA listed | Dimensions: 3.8"L × 3.1"W × 2.2"H
• OEM vs Generic: This is a factory-authorized Carrier/Totaline part (P201-35150) built to exact VA and voltage tolerance specs. Generic transformers often run at wider tolerances, risking undervoltage lockouts on sensitive control boards and premature failure under peak load.
• Install difficulty: 2/5 — Disconnect all power before servicing. Tools needed: multimeter (verify 0V at primary before touching wiring), flathead and Phillips screwdrivers, wire nuts or spade terminals. Label all wires before disconnecting. Verify 24V output at secondary terminals before reassembling the unit.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model YAC36100YAC107. Also cross-references Totaline P201-35150 and part number HCTY156D0LS11102. Confirm your unit's data plate shows a 50VA transformer requirement and 120/208/240V primary voltage before ordering. Need fitment confirmation? Our HVAC parts specialists verify compatibility before you buy — order with confidence.