OEM Carrier Transformer 40VA 120V–24V for Model UPFLOW150UA%14

This OEM replacement transformer (part number P201-35150) is the factory-specified control-circuit transformer for the Carrier UPFLOW150UA%14 upflow gas furnace. Its job is to step down line voltage (120V) to the 24V AC signal that powers your thermostat, control board, gas valve, and all low-voltage safety circuits. When this transformer fails, the entire control circuit goes dark — the thermostat becomes unresponsive, the furnace won't call for heat, and no error codes are generated because the board itself has no power.

• Specs: 40VA rated | Primary: 120V AC | Secondary: 24V AC | Factory-matched impedance and thermal cutoff — designed to exact OEM tolerances for the UPFLOW150UA%14 platform
• OEM vs Generic: The OEM P201-35150 transformer is wound to Carrier's exact VA rating and insulation class. Generic substitutes often underrate VA capacity, leading to overheating under multi-zone or multi-accessory loads and premature control board failure.
• Install Difficulty: 2/5 — Shut off the furnace disconnect and verify zero voltage at the transformer terminals before touching any wiring. Tools needed: flathead and Phillips screwdrivers, a multimeter (verify 24V output after install), and wire nuts or spade connectors as applicable. Photograph all wiring before disconnecting.
• Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Confirmed fit for Carrier model UPFLOW150UA%14 upflow gas furnace. Always verify primary voltage (120V) and VA rating on your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you buy — no guesswork required.