OEM Carrier Furnace Transformer 120V to 24V 40VA for Model UPFLOW100U3619X

This is the OEM factory-specified control transformer for the Carrier UPFLOW100U3619X upflow furnace. The transformer steps down 120V line voltage to a safe 24V (with a 12V tap) to power the low-voltage control circuit — including the thermostat, gas valve, inducer relay, and ignition board. When this transformer fails, the entire control circuit goes dark: the thermostat loses power, the furnace will not respond to any call for heat, and no diagnostic codes will display. Electrical surges, shorted control wiring, and normal wear are the most common causes of failure.

• Specs: 120V primary | 24V / 12V secondary | 40VA output | OEM part number HT01CN001 | Replaces legacy part numbers HT01BJ115, 19EA41612, 19EA42612
• OEM vs Generic: OEM transformers are wound to exact Carrier factory tolerances, ensuring stable 24V output under full control-circuit load. Off-brand substitutes often produce voltage sag under load, causing erratic lockouts, nuisance trips, and premature board failures.
• Install difficulty: 2/5 — Turn off power at the breaker and verify voltage is absent before touching any wiring. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph existing wiring connections before disconnecting. Typically a 15–30 minute replacement for a qualified technician.
• Warranty: 1-year OEM factory warranty. In stock — ships same business day from our warehouse.

Compatibility: Designed as a direct OEM drop-in replacement for the Carrier UPFLOW100U3619X upflow gas furnace. Always verify your unit's data plate voltage and VA requirements before ordering. Our parts specialists are available to confirm fitment — reach out before you order if you have any questions.