OEM Carrier 40VA Control Transformer for Model UPFLOW150FAUHAC14A

This OEM control transformer (part number P201-35150) is the factory-specified replacement for the Carrier UPFLOW150FAUHAC14A upflow air handler. The transformer steps down line voltage (120V) to the 24V AC signal that powers your thermostat, control board, and all low-voltage switching circuits. When the transformer fails, the entire control circuit goes dead — the thermostat goes blank, the blower won't respond to calls for heating or cooling, and no diagnostic codes will display. It is one of the first components to check during a no-response service call.

• Specs: Input: 120V AC | Output: 24V AC | VA Rating: 40VA | Form factor: chassis-mount | Terminal connections: wire leads | Factory-matched to OEM tolerances
• OEM vs Generic: This OEM unit (P201-35150) is built to Carrier's exact VA rating and insulation class, ensuring stable 24V output under full control-circuit load. Generic transformers can drift under load, causing nuisance lockouts, board resets, or premature contactor failure.
• Install difficulty: 2/5 — Shut off unit power at the disconnect and breaker before proceeding. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter, wire nuts. Verify output voltage (should read 24–28V AC) before reconnecting the control board. Photograph all wiring before disconnecting.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Designed for the Carrier UPFLOW150FAUHAC14A upflow air handler. Confirm input voltage and VA rating on your unit's data plate before ordering. Not sure if this is the right part? Our HVAC parts specialists verify fitment before you buy — contact us before placing your order.