OEM Carrier 40VA Control Transformer P201-35150 for Model UPFLOW100FAUHAC14

This OEM control transformer is the factory-specified replacement for the Carrier UPFLOW100FAUHAC14 upflow air handler. The transformer steps down 120V line voltage to the 24V AC signal that powers your thermostat circuit, control board, and all safety relays. When it fails, the entire control circuit goes dark — your thermostat becomes unresponsive, the system won't call for heat or cooling, and no error codes are generated because there's simply no power to produce them.

• Specs: 120V primary | 24V secondary | 40VA rated | Class 2 control circuit transformer | Factory-matched OEM replacement for part number P201-35150
• OEM vs Generic: This OEM transformer meets Carrier's exact VA rating and insulation class. Undersized or off-brand transformers frequently trip on thermal overload or fail to sustain 24V under full relay load, causing nuisance lockouts and premature board damage.
• Install difficulty: 2/5 — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdriver, multimeter, wire nuts or terminals. Verify primary and secondary voltage with your multimeter after install before re-energizing the full system.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse.

Compatibility: Designed for the Carrier UPFLOW100FAUHAC14 upflow air handler. Always verify the 120V primary / 24V secondary / 40VA specification against your unit's wiring diagram or data plate before ordering. Our fitment team is available to confirm compatibility — reach out before you buy.