OEM Carrier Control Transformer 50VA 120/208/240V–24V for Model UPFLOW150FAUHAC14

This is the genuine OEM factory-specified step-down transformer (part number P201-35150) for the Carrier UPFLOW150FAUHAC14 upflow air handler. The transformer converts incoming line-voltage power (120, 208, or 240 VAC) down to a safe 24VAC to energize the low-voltage control circuit — powering the thermostat, control board, contactor coil, and all 24V accessories. When this transformer fails, the entire control circuit goes dark: the thermostat goes blank, the system won't respond to any call for heating or cooling, and no low-voltage fuses will hold. Replacing it is almost always the fastest and most cost-effective fix before suspecting the control board.

• Specs: 50VA rating | Primary: 120/208/240 VAC multi-tap | 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, manufactured to exact VA and voltage tolerances. Undersized or off-tolerance aftermarket transformers can overheat, trip the internal fuse, or cause erratic control board behavior — costing far more in callbacks than the price difference.
• Install difficulty: 3/5 — Shut off all power at the breaker before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output post-install). Label or photograph all low-voltage wiring connections before disconnecting. Verify the primary tap is matched to your supply voltage.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model UPFLOW150FAUHAC14. Also cross-references to Totaline P201-35150. Confirm your unit's supply voltage (120V or 240V) to ensure the correct primary tap is used on installation. Questions about fitment? Our HVAC parts specialists verify compatibility before you order — call or chat us today.