OEM Carrier Transformer 50VA 120/240-24V for Model UPFLOW070FAUHC12

This is the genuine OEM step-down transformer for the Carrier UPFLOW070FAUHC12 upflow gas furnace. Part number P201-35150, this single-phase transformer converts incoming line voltage (120/208/240 VAC) down to a safe 24V AC output to power the furnace control board, thermostat, and all low-voltage control circuits. When the transformer fails, the entire control circuit loses power — symptoms include a completely unresponsive thermostat, a furnace that won't start, or a blown 3-amp fuse on the control board that keeps blowing on reset.

• Specs: 50VA rating | Primary voltage: 120/208/240 VAC | Secondary voltage: 12/24 VAC | Single phase | 60 Hz | CSA listed | Totaline/Carrier OEM factory part
• OEM vs Generic: OEM transformers are wound to exact factory VA ratings and insulation class, protecting sensitive control boards from voltage fluctuations. Generic off-brand transformers frequently run outside rated VA tolerance, risking control board damage and nuisance fuse failures.
• Install difficulty: 2/5 — Shut off all power to the furnace at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, wire labels or masking tape. Photograph all wire connections before disconnecting. Note: a blown transformer is often caused by a short downstream — inspect thermostat wiring and the control board before powering up the replacement.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed as the factory-specified replacement for Carrier model UPFLOW070FAUHC12. Always verify the part number on your existing transformer's label before ordering to confirm 50VA rating and voltage configuration match your unit's data plate. Questions about fitment? Our HVAC parts team verifies compatibility before you order — reach out before you buy.