OEM Carrier Control Transformer 50VA 120/208/240-12/24V for Model YAC36100YAC105 (P201-35150)

This is the genuine OEM factory-replacement control transformer for the Carrier YAC36100YAC105, sold under part number P201-35150 (also sourced as a Totaline factory authorized part). The transformer steps down high-voltage line power (120, 208, or 240 VAC) to safe low-voltage output (12/24 VAC) that powers your system's control board, thermostat circuit, and all low-voltage switching components. At 50VA, it provides ample capacity for multi-stage systems with accessories. When a transformer fails, the result is typically complete loss of low-voltage control — the thermostat goes dark, the system won't respond to any call for heating or cooling, and no fault codes appear because the control board itself has no power.

• Specs: 50 VA rating | Primary: 120 / 208 / 240 VAC multi-tap | Secondary: 12/24 VAC | 60 Hz | Single phase | CSA listed | Dimensions: 3.8" L × 3.1" W × 2.2" H
• OEM vs Generic: This OEM unit is built to Carrier's exact VA rating, insulation class, and multi-tap wiring configuration. Generic transformers often ship at reduced VA capacity, which causes premature thermal cutout failure when accessories (humidifiers, UV lights, zoning boards) are on the same circuit.
• Install difficulty: 3/5 — Requires shutting off both the disconnect and the main breaker before any work. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter (verify 0V before touching terminals). Photograph all wire connections and note primary tap selection before removal. Incorrect tap selection will damage downstream controls.
• Warranty: 1-year OEM factory warranty. In stock — ships same business day from our warehouse.

Compatibility: Factory-specified replacement transformer for Carrier model YAC36100YAC105. Verify your unit's line voltage (120V, 208V, or 240V) to select the correct primary tap on installation. Cross-reference part numbers: P201-35150, HCTY156D0LS11102 (Totaline). Questions about fitment? Our HVAC-trained team confirms compatibility before you order — call or chat today.