OEM Carrier Transformer 40VA 120V to 24V for Model FX4DNF061L00ACAA

This OEM replacement transformer (part number HT01CN241) is the factory-specified control circuit transformer for the Carrier FX4DNF061L00ACAA air handler. The transformer steps down 120V line voltage to the 24V AC signal that powers your thermostat, control board, and all low-voltage relay circuits. When this component fails, the entire control circuit goes dead — your thermostat loses power, the system refuses to respond to any calls for heating or cooling, and you may blow a fuse on the control board repeatedly. It is one of the first components to check when absolutely nothing in the system responds.

• Specs: 40VA rating | 120V primary input | 24V secondary output | Direct OEM replacement for part number HT01CN241 | Factory-matched electrical tolerances
• OEM vs Generic: This is the genuine OEM Carrier transformer. OEM units are wound to exact VA and voltage specifications, ensuring stable 24V output under full control circuit load. Generic transformers often under-deliver on VA rating, causing nuisance lockouts and premature control board damage.
• Install difficulty: 2/5 — Shut off power at the disconnect before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label or photograph all low-voltage wiring before disconnecting. Confirm 24V output with a multimeter after installation before restoring full power.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Ships same business day from our stocked warehouse.

Compatibility: Engineered as a direct drop-in for the Carrier FX4DNF061L00ACAA fan coil air handler. Always verify your unit's data plate and the original transformer's VA and voltage ratings before ordering to ensure an exact match. Have your model and part numbers ready — our HVAC parts specialists are available to confirm fitment before you buy. Order now and receive same-day shipping on all in-stock parts.