OEM Carrier 50VA Control Transformer (P201-35150) for Model UPFLOW100FAU12A

This factory-authorized OEM control transformer (part number P201-35150) is the direct replacement for the Carrier UPFLOW100FAU12A upflow air handler. The transformer steps down high-voltage line power — 120, 208, or 240 VAC — to a safe 12/24V AC output that energizes your system's control board, thermostat circuit, and low-voltage accessories. When this transformer fails, the entire control circuit loses power: the thermostat goes blank, the system refuses to start, or the unit intermittently drops out — symptoms that are easy to misdiagnose as a board or thermostat failure. Replacing the transformer is the fastest, most cost-effective first step when the low-voltage circuit goes dead.

• Specs: 50VA rating | Primary: 120/208/240 VAC | Secondary: 12/24 VAC | 60Hz | Single phase | CSA listed | Factory part number P201-35150
• OEM vs Generic: This OEM unit is wound to exact factory VA and voltage tolerances. Undersized or off-spec generic transformers can overheat, trip thermal cutoffs, and damage sensitive control boards — costing far more than the transformer itself.
• Install difficulty: 2/5 — Always shut off power at the breaker before working on the control circuit. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter (to confirm 24V output after install). Label or photograph all low-voltage wiring before disconnecting terminals.
• Warranty: 1-year OEM factory warranty. In stock and ships the same business day from our warehouse.

Compatibility: Direct OEM replacement for the Carrier UPFLOW100FAU12A upflow air handler. Verify your existing transformer's VA rating and primary/secondary voltages on the unit data plate before ordering. Our HVAC parts team can confirm fitment — contact us before you buy if you have any questions.