OEM Carrier Transformer 40VA 120V–24V for Model FX4DNF061L15ABAA

This OEM control circuit transformer (part# HT01CN241) is the factory-specified replacement for the Carrier FX4DNF061L15ABAA air handler. The transformer steps down 120V line voltage to the 24V AC signal required to power the thermostat, control board, and all low-voltage components in your system. When this transformer fails, nothing in your system responds — the thermostat goes dark, relays won't energize, and the entire unit sits completely dead. It is often the first component to check when a blown fuse or shorted low-voltage wire has taken out the control circuit.

• Specs: 40VA rating | 120V primary / 24V secondary | Class 2 control transformer | OEM part number HT01CN241 | Factory-matched for Carrier FX4DNF061L15ABAA air handlers
• OEM vs Generic: The OEM HT01CN241 transformer is wound and insulated to Carrier's exact VA and thermal specifications. Generic units frequently underperform under sustained load, leading to premature failure and potential damage to connected control boards — a costly downstream problem.
• Install difficulty: 2/5 — Shut off all power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, needle-nose pliers, multimeter. Label all low-voltage wiring before disconnecting the old transformer. Confirm 24V output with a multimeter before reinstating power to the full system.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed specifically for the Carrier FX4DNF061L15ABAA air handler. Verify your existing transformer's VA rating and primary/secondary voltages on the unit data plate before ordering. Our parts specialists are available to confirm fitment — order with confidence and get your system back online fast.