OEM Carrier Transformer 40VA 120V to 24V for Model FY4ANF036015AAAA

This OEM replacement transformer (part number HT01CN241) is the factory-specified control circuit transformer for the Carrier FY4ANF036015AAAA fan coil unit. The transformer steps down line voltage (120V) to the 24V AC signal used by the thermostat, control board, and all low-voltage components. When this transformer fails, the entire control circuit goes dead — the thermostat goes blank, the system won't respond to any commands, and no heating or cooling will occur regardless of other component condition. It is often the first part to check when a system appears completely unresponsive.

• Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | Replaces OEM part number HT01CN241 | Factory-matched output tolerance for stable low-voltage operation
• OEM vs Generic: This OEM unit is wound and insulated to Carrier's exact specifications, ensuring correct VA output and thermal protection. Generic transformers often underrate VA capacity, causing premature burnout under normal thermostat loads or with smart thermostat accessories.
• Install difficulty: 2/5 — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or quick-connects. Confirm primary and secondary wiring polarity before reconnecting. Always verify 24V output with a multimeter before closing the unit.
• Warranty: 1-year OEM factory warranty against defects. In-stock units ship same business day from our climate-controlled warehouse.

Compatibility: Designed specifically for the Carrier FY4ANF036015AAAA fan coil unit. Verify your existing transformer's VA rating and primary/secondary voltages on the unit's data plate or wiring diagram before ordering to ensure a correct match. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you order — contact us anytime.