OEM Carrier 50VA Control Transformer P201-35150 for Model YAC3080YAC101

This OEM step-down transformer is the factory-specified replacement for the Carrier YAC3080YAC101 HVAC system. The transformer converts high-voltage line power (120/208/240 VAC) down to the safe 12/24 VAC required to energize the control board, thermostat, and all low-voltage switching circuits. When this transformer fails, the entire control circuit goes dead — resulting in a completely unresponsive system, a blank thermostat display, or a unit that trips repeatedly with no apparent cause. Replacing it with the correct OEM part restores factory-matched electrical performance immediately.

• Specs: 50 VA rating | Primary voltage: 120/208/240 VAC multi-tap | Secondary voltage: 12/24 VAC | 60 Hz single-phase | CSA listed | OEM Part # P201-35150
• OEM vs Generic: This is the genuine Carrier/Totaline factory part. OEM transformers are wound and insulated to exact VA and voltage tolerances. Generic alternatives often fall short on VA capacity under load, causing nuisance tripping, premature control board failure, or subtle voltage sags that confuse diagnostics.
• Install difficulty: 3/5 — Shut off all power at the breaker and verify with a multimeter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter, needle-nose pliers. Label all low-voltage wires before disconnecting. Check secondary output (should read ~24–28 VAC unloaded) before buttoning up 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 YAC3080YAC101. Verify primary voltage tap matches your supply voltage (120V or 208/240V) before installation — incorrect tap selection will damage downstream control components. Questions about fitment? Our HVAC parts specialists confirm compatibility before you order — no guesswork required.