OEM Carrier Furnace Transformer 120V to 24V 40VA — HT01CN001 for Model UPFLOW100FAUHC12B

The Carrier HT01CN001 is the factory OEM control transformer for the UPFLOW100FAUHC12B upflow furnace. Its job is to step down 120V line voltage to a safe 24V (with a 12V tap) that powers every low-voltage component in the system — your thermostat, gas valve coil, inducer relay, and control board. When this transformer fails, the entire control circuit goes dark: the thermostat display goes blank, the system refuses to fire, and you may detect a faint buzzing or burning smell near the furnace cabinet. Replacing it with the correct OEM unit restores the factory-spec voltage your control board was designed to receive.

• Specs: 120V primary | 24V / 12V secondary | 40VA rated | Factory Authorized Part — Cross-references HT01BJ115, 19EA41612, 19EA42612, HT01CN001A
• OEM vs Generic: The OEM HT01CN001 is wound and potted to Carrier's exact VA and impedance tolerances. Off-brand transformers rated at nominally similar specs frequently deliver marginal secondary voltages, causing nuisance lockouts, contactor chatter, and premature control board failures.
• Install difficulty: 2/5 — Shut off the furnace disconnect and verify zero voltage at the primary terminals before proceeding. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (verify 24V output after installation). Photograph all wiring before disconnecting. Direct plug-and-play replacement — no splicing required on most applications.
• Warranty: 1-year Carrier OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered as the direct OEM replacement for the Carrier UPFLOW100FAUHC12B upflow gas furnace. Always verify your unit's data plate voltage and VA requirements before ordering. Our fitment team is available to confirm compatibility before you buy — reach out before placing your order.