OEM Carrier Furnace Transformer 40VA 120V Primary / 12-24V Secondary for Model UPFLOW080U2419A

This is the factory OEM replacement transformer for the Carrier UPFLOW080U2419A upflow gas furnace. The transformer steps down 120V line voltage to the 24V control circuit voltage that powers your thermostat, gas valve, inducer relay, and all low-voltage control logic. When this transformer fails, the entire control circuit goes dead — the thermostat gets no power, the furnace will not respond to any call for heat, and no diagnostic fault codes will appear on the board. A failed transformer is often misdiagnosed as a bad control board, making correct identification critical before parts replacement.

• Specs: 40VA rating | 120V primary | 12V / 24V dual secondary | Replaces legacy part numbers HT01BJ115, 19EA41612, and 19EA42612 | Factory part number HT01CN001
• OEM vs Generic: OEM transformers are wound and insulated to Carrier's exact VA and voltage tolerances. Undersized or off-spec generic transformers can brown out under load, causing intermittent lockouts and premature control 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 all low-voltage wires before disconnecting. A blown fuse on the control board is a common companion fault — inspect and replace the 3A fuse if present.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Directly fits the Carrier UPFLOW080U2419A upflow gas furnace. This transformer is also used across the broader Carrier, Bryant, and Payne furnace platform — verify your existing transformer's VA rating and primary/secondary voltages on the data label before ordering. Our fitment team is available to confirm compatibility prior to purchase. Order now — in stock and ships today.