OEM Carrier 40VA Control Circuit Transformer HT01CN241 for Model FY4ANF048000AAAA

This is the factory-specified OEM replacement transformer (part number HT01CN241) for the Carrier FY4ANF048000AAAA 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 control board. When this transformer fails, nothing in the system responds: the thermostat goes blank, the unit won't call for cooling or heating, and no fault codes are generated because the control board itself loses power.

• Specs: 40VA rated | Primary: 120V AC | Secondary: 24V AC | Class 2 transformer | Replaces OEM part number HT01CN241
• OEM vs Generic: This OEM transformer is wound to Carrier's exact VA and voltage tolerance specifications. Generic transformers often run underrated VA, causing premature burnout under normal control circuit loads — especially in systems with multiple accessories drawing 24V power.
• Install Difficulty: 2/5 — Disconnect power at the breaker before beginning any work. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to confirm 0V before touching wiring). Photograph all wiring connections before disconnecting. Match wire colors carefully on both primary and secondary terminals.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed specifically for the Carrier FY4ANF048000AAAA fan coil unit (4-ton, 208/230V). Always verify your existing transformer's VA rating and primary/secondary voltages against your unit's data plate before ordering. Our fitment specialists are available to confirm compatibility before you buy — no guesswork required.