OEM Carrier Transformer 40VA 120V to 24V for Model FX4BNB061000AAAA

This OEM replacement transformer (part number HT01CN241) is the factory-specified control circuit transformer for the Carrier FX4BNB061000AAAA fan coil air handler. The transformer steps line voltage (120V) down to the 24V signal voltage required to power the thermostat, control board, and all low-voltage switching circuits. When the transformer fails, the entire control circuit goes dark — the thermostat loses power, the system will not respond to any calls for heating or cooling, and nothing works at all. A blown transformer is often the result of a short in the low-voltage wiring or a failed component drawing excess current, so inspect the control wiring carefully before installing this replacement.

• Specs: 40VA rating | Primary: 120V | Secondary: 24V | Class 2 transformer | Mounts directly to factory bracket in the FX4BNB061000AAAA air handler cabinet
• OEM vs Generic: This OEM unit (HT01CN241) is wound and rated to Carrier's exact VA and insulation specifications, ensuring proper current capacity and longevity. Generic transformers may be undersized in VA rating, causing premature thermal failure under normal HVAC control loads.
• Install difficulty: 2/5 — Disconnect all power at the breaker before servicing. Tools needed: flathead and Phillips screwdriver, needle-nose pliers, multimeter. Label all low-voltage wires before disconnecting. Verify 24V output with a multimeter after installation before restoring full power.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier FX4BNB061000AAAA fan coil air handler. Verify your existing transformer's VA rating and primary/secondary voltages against your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — ships today when ordered before 3PM.