OEM Carrier 40VA Control Transformer HT01CN241 for Model FX4DNF061010AAAA

This is the factory OEM replacement transformer (part number HT01CN241) for the Carrier FX4DNF061010AAAA fan coil air handler. The transformer steps down 120V line voltage to 24V AC to power the low-voltage control circuit — including the thermostat, contactor coil, and control board. When the transformer fails, the entire control circuit goes dead: the thermostat goes blank, the system stops responding to calls for heating or cooling, and no components energize. A blown transformer is often caused by a short in the low-voltage wiring, so always inspect the 24V circuit before replacing this part.

• Specs: 40VA rated | Primary: 120V AC | Secondary: 24V AC | Direct OEM replacement for part number HT01CN241 | Designed to factory fit and electrical specification for the FX4DNF061010AAAA air handler
• OEM vs Generic: This factory OEM transformer is wound to exact VA and voltage tolerances for the Carrier FX4DNF061010AAAA. Generic transformers may under-rate VA capacity, leading to overheating, nuisance tripping, or premature failure — especially when multiple 24V accessories (humidifiers, UV lights, zone boards) share the circuit.
• Install Difficulty: 2/5 — Shut off power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to confirm 24V output after install and to check for low-voltage shorts before installing). Label or photograph all wire connections prior to removal.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Engineered for the Carrier FX4DNF061010AAAA fan coil air handler. Verify your existing transformer's primary/secondary voltage and VA rating against your unit's data plate before ordering. If you are unsure of fitment, our HVAC parts specialists are available to confirm compatibility before you purchase — same-day shipping on all in-stock orders.