OEM Carrier 40VA Control Transformer HT01CN001 for Model UPFLOW100UAAC14B

This OEM control transformer (part number HT01CN001) is the factory-specified replacement for the Carrier UPFLOW100UAAC14B upflow air handler. The transformer steps line voltage (120V) down to 24V AC to power the low-voltage control circuit — including the thermostat, contactor coil, and control board. When it fails, the entire control system goes dead: the thermostat loses power, the system won't respond to any calls for heating or cooling, and the unit sits completely non-functional despite having line voltage present.

• Specs: 120V primary | 24V secondary | 40VA rating | Compatible with standard R, C, W, Y, G thermostat wiring | Factory-matched output tolerance
• OEM vs Generic: The OEM HT01CN001 is wound to Carrier's exact VA and voltage specifications. Generic transformers often underrate their true VA capacity, leading to voltage sag under load, nuisance lockouts, and premature control board failure.
• Install Difficulty: 2/5 — Always disconnect power at the breaker before servicing. Tools needed: flat-head and Phillips screwdrivers, multimeter (to verify 24V output before reconnecting). Label or photograph all low-voltage wire connections before removing the old unit.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier UPFLOW100UAAC14B upflow air handler. Always verify your unit's data plate and existing transformer primary/secondary voltage ratings before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you buy if you have any questions.