OEM Carrier Furnace Transformer 40VA 120V to 24V for Model UPFLOW080U42M19

This is the genuine OEM Carrier transformer (part number HT01CN001), the factory-specified replacement for the Carrier UPFLOW080U42M19 upflow gas furnace. The control transformer steps line voltage (120V) down to the low-voltage (24V/12V) needed to power the control board, thermostat, and all 24V control circuit components. When this transformer fails, the entire control circuit loses power — the thermostat goes blank, the furnace refuses to respond to any command, and the system is completely inoperative. Replacing it with the correct OEM unit restores full system functionality immediately.

• Specs: 120V primary | 24V / 12V secondary | 40VA rated | Factory Authorized Part — OEM part number HT01CN001 (also supersedes HT01BJ115, 19EA41612, 19EA42612)
• OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances required by Carrier's control board. Undersized or off-spec generic units can under-power the control board, cause nuisance lockouts, or fail prematurely under normal heating season loads.
• Install difficulty: 2/5 — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 0V before touching wiring). Photograph all low-voltage wiring connections before disconnecting. Swap wire-for-wire and restore power to verify 24V output before closing the cabinet.
• Warranty: 1-year OEM factory warranty. In stock — ships same business day from our warehouse.

Compatibility: Direct OEM replacement for the Carrier UPFLOW080U42M19 upflow gas furnace. Verify the 120V primary and 40VA rating on your unit's data plate before ordering. If you're unsure of fitment, our HVAC parts team verifies compatibility before you buy — order with confidence and get back up and running today.