OEM Carrier 40VA Control Transformer HT01CN241 for Model FY4ANF042T00AAAA

This OEM control transformer (part number HT01CN241) is the factory-specified replacement for the Carrier FY4ANF042T00AAAA fan coil unit. The transformer steps down 120V line voltage to 24V AC, powering the entire low-voltage control circuit — including the thermostat, contactor coil, and any connected controls. When this component fails, absolutely nothing in the system responds: the thermostat goes dark, the contactor won't energize, and no heating or cooling operation is possible. A failed transformer is often confirmed with a simple multimeter check showing 0V on the secondary (24V) side.

• Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | Factory OEM part number HT01CN241 | Designed to factory dimensional and thermal specifications
• OEM vs Generic: This OEM transformer is wound and insulated to Carrier's exact factory tolerances. Generic alternatives may be undersized in VA rating or lack adequate thermal protection, risking premature failure or nuisance tripping under full control-circuit load.
• Install Difficulty: 2/5 — Shut off all power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Confirm secondary output voltage after installation before closing the unit. Always photograph or label wiring connections prior to removal.
• Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier FY4ANF042T00AAAA fan coil unit. Verify your existing transformer's primary voltage, secondary voltage, and VA rating on the unit's data plate or existing component label before ordering. Our fitment team is available to confirm compatibility prior to purchase — same-day shipping means your repair won't wait.