OEM Carrier 40VA Control Transformer HT01CN241 for Model FY4ANF030010AAAA

This OEM Carrier control transformer (part number HT01CN241) is the factory-specified replacement for the FY4ANF030010AAAA fan coil unit. The transformer steps down 120V line voltage to the 24V AC control voltage that powers your thermostat, contactor coil, and all low-voltage control circuitry. When this component fails, the entire control circuit goes dead — the system will not respond to thermostat calls, relays won't energize, and no heating or cooling will occur. A blown transformer is often caused by a short in the low-voltage wiring or a failed downstream component, so always inspect the 24V circuit before replacing.

• Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | Factory-matched OEM part number HT01CN241 | Designed for Carrier fan coil applications
• OEM vs Generic: This OEM transformer is wound to Carrier's exact VA and voltage specifications, ensuring reliable 24V output under full control circuit load. Generic alternatives often use thinner windings that overheat and fail prematurely, especially in high-demand multi-zone systems.
• Install difficulty: 2/5 — Shut off power at the breaker and confirm zero voltage with a multimeter before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label all low-voltage wires before disconnecting, and inspect the 24V circuit for shorts that may have caused the original failure.
• Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our stocked warehouse.

Compatibility: Engineered specifically for the Carrier FY4ANF030010AAAA fan coil unit. Verify your existing transformer's VA rating and primary/secondary voltages on the unit data plate before ordering. If you have any questions about fitment, our HVAC parts specialists will confirm compatibility before your order ships — same business day.