OEM Carrier 50VA Control Transformer P201-35150 for Model UPFLOW180FAU%14

This factory-authorized OEM step-down transformer (part# P201-35150) is the direct replacement for the Carrier UPFLOW180FAU%14 furnace. The transformer converts high-voltage line power — 120, 208, or 240 VAC — down to a safe 24V AC signal that powers your system's control board, thermostat, and all low-voltage control circuits. When this component fails, the entire control circuit loses power: your thermostat goes blank, the furnace won't respond to any call for heat, and nothing turns on. If your UPFLOW180FAU%14 is completely unresponsive and you've confirmed 24V is absent at the secondary terminals, this transformer is the first part to test and replace.

• Specs: 50VA rating | Primary voltage: 120/208/240 VAC multi-tap | Secondary voltage: 12/24V AC | 60 Hz | Single phase | CSA listed | Dimensions: 3.8" L × 3.1" W × 2.2" H | Weight: 2.3 lbs
• OEM vs Generic: This is a genuine Carrier/Totaline factory-authorized part. OEM transformers are wound to exact VA and voltage tolerances, protecting downstream control boards. Generic units often run under-rated VA, leading to overheating, nuisance tripping, or premature control board failure.
• Install difficulty: 2/5 — Shut off all power at the breaker and disconnect switch before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 0V before touching terminals and confirm 24V output after installation). Always photograph existing wiring before disconnecting leads. Typically a 20–30 minute replacement for an experienced DIYer.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our climate-controlled warehouse.

Compatibility: Engineered specifically for the Carrier UPFLOW180FAU%14 upflow gas furnace. Verify your data plate shows part# P201-35150 or cross-reference your existing transformer's VA rating (50VA) and primary voltage tap (120/208/240V) before ordering. Need fitment confirmation? Our HVAC parts specialists verify compatibility before every order — reach out before you buy.