OEM Carrier Furnace Transformer 40VA 120V to 24V for Model UPFLOW080U42M19A

This OEM Carrier transformer (part# HT01CN001) is the factory-specified control circuit transformer for the Carrier UPFLOW080U42M19A upflow gas furnace. The transformer steps down line voltage from 120V primary to 24V/12V secondary at 40VA, powering the low-voltage control circuit that communicates between your thermostat, control board, gas valve, and all safety switches. When this transformer fails — due to electrical surges, short circuits in control wiring, or normal wear — the entire control circuit goes dark. Symptoms include a completely unresponsive thermostat, a furnace that won't activate on a call for heat, or faint buzzing/humming from the transformer itself with no system response.

• Specs: 120V primary | 24V/12V secondary | 40VA rated | OEM part# HT01CN001 | Direct factory replacement for Carrier UPFLOW080U42M19A
• OEM vs Generic: This is the genuine Carrier OEM transformer — factory-matched VA rating and winding tolerances. Undersized or off-spec generic transformers risk nuisance trips, control board damage, and premature failure under full furnace load.
• Install difficulty: 3/5 — Shut off all power to the furnace before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output post-install). Label all low-voltage wires before disconnecting. Verify secondary output before closing the cabinet.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier UPFLOW080U42M19A upflow gas furnace. Always verify the OEM part number on your unit's wiring diagram or data plate before ordering. Have a compatibility question? Our HVAC parts specialists confirm fitment before you buy — order with confidence.