OEM Carrier 50VA Control Transformer P201-35150 for Model UPFLOW125FAUAC14A

This is the genuine OEM factory-replacement control transformer for the Carrier UPFLOW125FAUAC14A upflow furnace. The transformer steps down incoming line voltage (120/208/240 VAC) to a safe 24V output that powers the system's control board, thermostat, and all low-voltage control circuits. When this transformer fails, the entire control circuit goes dark — symptoms include a completely unresponsive thermostat, a blank control board, or a furnace that won't fire under any call for heat. Replacing a failed transformer is one of the most decisive, cost-effective repairs in HVAC service.

• Specs: 50 VA rating | Primary: 120/208/240 VAC | Secondary: 12/24 VAC | Single-phase | 60 Hz | CSA listed | Dimensions: 3.8" L × 3.1" W × 2.2" H
• OEM vs Generic: This is a genuine Carrier/Totaline factory part (P201-35150), manufactured to exact VA tolerance and insulation class. Off-brand transformers often run underrated VA loads, causing thermal trips and premature failure — especially in multi-stage or communicating systems like the UPFLOW125FAUAC14A.
• Install difficulty: 2/5 — Always shut off the disconnect and verify zero voltage before disconnecting wires. Tools needed: flathead and Phillips screwdrivers, multimeter, wire labels or phone camera for documentation. Primary and secondary leads are clearly color-coded for straightforward replacement.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse — order by 3 PM local time to go out today.

Compatibility: Direct factory replacement for Carrier model UPFLOW125FAUAC14A. Verify primary voltage matches your unit's supply (120V or 240V) using the data plate before ordering. Multi-tap primary supports both 120V and 240V installations. Need fitment help? Our HVAC parts team confirms compatibility before you order — no guesswork.