OEM Carrier Transformer 40VA 120V to 24V for Model FB4CNP060L00AEAA

This is the factory OEM replacement transformer (part number HT01CN241) for the Carrier FB4CNP060L00AEAA fan coil air handler. The transformer steps down line voltage from 120V to the 24V AC required to power your system's entire control circuit — including the thermostat, contactor coil, and control board. When this transformer fails, absolutely nothing in the system responds: the thermostat goes dark, the blower won't energize, and no heating or cooling call is answered. A failed transformer is often confirmed by measuring 0V AC on the secondary (24V) side with a multimeter while 120V is present on the primary.

• Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | OEM Part Number: HT01CN241 | Screw-terminal or quick-connect secondary leads | Factory-matched impedance and VA rating
• OEM vs Generic: OEM transformers are wound and rated to exact factory specifications, ensuring stable 24V output under full control-circuit load. Undersized or off-tolerance generic units can sag under load, causing intermittent lockouts, nuisance tripping, or premature control board failure.
• Install Difficulty: 2/5 — Disconnect power at the breaker and verify zero voltage before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Label all wiring before removal. Confirm secondary output voltage after installation before closing the cabinet.
• Warranty: 1-year OEM factory warranty against defects. In stock and ships same business day from our NationalHVACParts.com warehouse.

Compatibility: Designed as the direct OEM drop-in replacement for the Carrier FB4CNP060L00AEAA 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. Our parts specialists are available to confirm fitment — reach out before you order if you have any questions.