OEM Carrier Furnace Transformer 120V to 24V 40VA for Model UPFLOW100FAUAC14B

This is the factory OEM replacement transformer (part number HT01CN001) for the Carrier UPFLOW100FAUAC14B upflow gas furnace. The transformer steps down 120V line voltage to 24V to power the low-voltage control circuit — including the thermostat, gas valve, inducer relay, and control board. When this component fails, the entire control circuit goes dark: your thermostat goes blank, the furnace will not initiate a heat cycle, and nothing responds. It is one of the first components to inspect when a furnace is completely unresponsive.

• Specs: 120V primary | 24V / 12V secondary | 40VA power rating | Direct OEM replacement for HT01CN001 | Also replaces legacy part numbers HT01BJ115, 19EA41612, and 19EA42612
• OEM vs Generic: This is the factory-spec OEM unit, wound to exact VA and voltage tolerances required by Carrier. Undersized or generic transformers can overload, trip built-in thermal protection, and damage connected control boards — costing far more than the part itself.
• Install difficulty: 2/5 — Turn off all power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring connections before removal. Confirm 24V output with a multimeter after installation before restoring full power.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier UPFLOW100FAUAC14B upflow gas furnace. Verify your unit's data plate confirms the 120V primary / 24V secondary / 40VA specification before ordering. Have questions about fitment? Our HVAC parts specialists verify compatibility before you purchase — no guesswork required.