OEM Carrier Control Transformer 50VA 120/240–24V for Model UPFLOW125FAU14A

This is the factory-specified OEM replacement transformer for the Carrier UPFLOW125FAU14A upflow gas furnace. The transformer steps down incoming line voltage (120/208/240 VAC) to 24 VAC to power the furnace's control board, thermostat circuit, and all low-voltage devices. When it fails, the entire control circuit goes dark — symptoms include a completely unresponsive thermostat, a furnace that won't attempt ignition, or a system that trips the low-voltage fuse repeatedly without explanation. Replacing this transformer with the correct OEM unit restores stable, factory-rated voltage to every downstream component.

• Specs: 50 VA rating | Primary: 120/208/240 VAC multi-tap | Secondary: 12/24 VAC | 60 Hz | Single-phase | CSA listed | OEM Part # P201-35150
• OEM vs Generic: OEM transformers are wound to exact factory VA and voltage tolerances, ensuring no undervoltage to sensitive control boards. Generic units often run loose on secondary voltage output, which can cause nuisance lockouts or premature board failure.
• Install difficulty: 2/5 — Shut off all power at the breaker and disconnect the furnace before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Photograph all low-voltage wiring connections before removing the old transformer.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered for the Carrier UPFLOW125FAU14A upflow gas furnace. Verify your unit's data plate matches the 120/208/240 VAC primary and 24 VAC secondary specification before ordering. Our team is available to confirm fitment — don't guess on a critical low-voltage component. Order now and get back to comfort fast.