OEM Carrier 40VA Control Circuit Transformer for Model UPFLOW125FAUAC14

This is the OEM factory-specified replacement transformer (part number P201-35150) for the Carrier UPFLOW125FAUAC14 upflow gas furnace. The transformer steps down line voltage from 120V to 24V to power the low-voltage control circuit — including your thermostat, control board, gas valve, and safety switches. When this component fails, the entire control circuit goes dark: your thermostat shows no response, the furnace won't initiate a heating cycle, and diagnostic LEDs on the control board may fail to illuminate at all.

• Specs: Input 120VAC | Output 24VAC | 40VA rating | Class 2 transformer | Factory-matched for Carrier UPFLOW125FAUAC14
• OEM vs Generic: This OEM unit is wound to exact factory VA and voltage specifications, ensuring stable 24V output under full control-circuit load. Generic transformers often run under-rated VA, causing voltage sag that trips safeties or damages the control board over time.
• Install Difficulty: 2/5 — Shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire stripper. Label or photograph all wiring connections before removal. Confirm 24V output with a multimeter after installation before closing the access panel.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered and tested specifically for the Carrier UPFLOW125FAUAC14 upflow furnace. Always verify the part number on your existing transformer's label before ordering. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy — contact us today and get your system back up fast.