OEM Carrier 40VA Control Transformer HT01CN241 for Model FX4DNF061T15AAAA

This OEM replacement transformer (part number HT01CN241) is the factory-specified control circuit transformer for the Carrier FX4DNF061T15AAAA fan coil air handler. Its job is straightforward but absolutely critical: it steps down 120V line voltage to the 24V AC signal that powers your thermostat, control board, contactor coil, and every other low-voltage component in the system. When the transformer fails — often due to a wiring short, control board fault, or simple age — nothing works. The thermostat goes blank, the system refuses to respond to any call for heating or cooling, and you may measure zero volts at the secondary terminals with a multimeter.

• Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01CN241 | Designed for factory fit on Carrier FX4DNF061T15AAAA air handlers
• OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances. Undersized or off-spec generic units can overheat, blow fuses repeatedly, or fail to hold voltage under full control circuit load — especially on multi-stage systems.
• Install difficulty: 2/5 — Shut off power at the breaker and disconnect the furnace switch before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter, wire nuts. Label or photograph all wiring connections before removal. Confirm 24V output at secondary terminals after installation before closing the panel.
• Warranty: 1-year OEM factory warranty against defects. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier FX4DNF061T15AAAA fan coil air handler. Always verify your existing transformer's primary voltage, secondary voltage, and VA rating against your unit's data plate before ordering. If you're unsure of fitment, our HVAC parts specialists are available to confirm compatibility before you buy. Order today and get same-day shipping on all in-stock OEM parts.