OEM Carrier 40VA Control Transformer HT01CN001 for Model UPFLOW100FAUHAC14B

This OEM control transformer is the factory-specified replacement for the Carrier UPFLOW100FAUHAC14B upflow gas furnace. The transformer steps down 120V line voltage to the 24V signal required by the thermostat, control board, gas valve, and all low-voltage safety circuits. When this component fails, the entire control circuit goes dark — symptoms include a completely unresponsive thermostat, a blank or locked-out furnace control board, or a system that shows power at the unit but will not respond to any call for heat or cooling.

• Specs: Primary voltage: 120V | Secondary voltage: 24V | VA rating: 40VA | OEM part number: HT01CN001 | Factory-matched for Carrier UPFLOW100FAUHAC14B upflow furnaces
• OEM vs Generic: OEM transformers are wound to exact factory VA tolerances, ensuring stable 24V output under full load (contactor coil + gas valve + board simultaneously). Generic units may sag under load, causing nuisance lockouts or premature board failure.
• Install difficulty: 2/5 — Shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Label or photograph all low-voltage wiring before disconnecting.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier UPFLOW100FAUHAC14B upflow gas furnace. Verify your unit's data plate confirms 120V primary / 24V secondary / 40VA rating before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you order — just reach out before purchasing.