OEM Carrier Furnace Transformer 40VA 120V to 24V/12V for Model U19X080UW36B

This is the factory OEM replacement transformer for the Carrier U19X080UW36B furnace. The transformer steps down 120V line voltage to a safe 24V/12V output to power the low-voltage control circuit — including your thermostat, ignition sequencing, and safety controls. When this transformer fails, the entire control circuit loses power: the thermostat goes blank, the system refuses to respond to any call for heat, and you may detect a faint buzzing or burning smell near the furnace control box. Replacing the transformer with the correct OEM part is one of the most reliable and cost-effective fixes available for a completely unresponsive furnace.

• Specs: 120V Primary | 24V / 12V Secondary | 40VA Rating | OEM Part # HT01CN001 | Factory-matched output for Carrier U19X080UW36B control circuits
• OEM vs Generic: This is a genuine Carrier OEM transformer built to exact factory VA rating and winding tolerances. Undersized or off-spec aftermarket transformers are a leading cause of nuisance tripped breakers, burned control boards, and shortened system life — don't risk it on a component this critical.
• Install Difficulty: 3/5 — Shut off power at the disconnect and breaker before beginning. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers, non-contact voltage tester, multimeter. Label and photograph all wiring connections before removal. If the replacement transformer blows immediately, inspect all 24V control wiring for short circuits before condemning the part.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered as a direct drop-in replacement for the Carrier U19X080UW36B furnace. Verify your existing transformer's primary voltage, secondary voltage, and VA rating against your unit's data plate before ordering. Cross-references include legacy Carrier part numbers HT01BJ115, 19EA41612, and 19EA42612. Need fitment confirmation? Our HVAC parts specialists verify compatibility before you buy — contact us today and get this part shipped the same business day.