OEM Carrier Transformer 40VA 120V/24V for Model FA4ANC024008AGAA

This is the factory OEM replacement transformer (part# HT01CN236) for the Carrier FA4ANC024008AGAA air handler. The transformer steps down line voltage from 120V to 24V to power the low-voltage control circuit — including the thermostat, control board, and all relay coils. When the transformer fails, the entire control circuit goes dead: the thermostat goes blank, the system won't respond to any commands, and nothing operates. A blown transformer is often caused by a short in the low-voltage wiring, so always inspect the 24V circuit before installing a replacement.

• Specs: 40VA rating | 120V primary / 24V secondary | OEM part number HT01CN236 | Factory-matched output voltage and VA capacity for the FA4ANC024008AGAA air handler control circuit
• OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances required by Carrier's control board. Undersized or off-tolerance generic units can overheat, trip the internal thermal fuse prematurely, or deliver insufficient current to properly pull in contactors and relay coils.
• Install difficulty: 2/5 — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label or photograph all low-voltage wiring connections before removing the old transformer. Verify 24V output with a multimeter after installation before restoring full power.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. In-stock units ship same business day from our warehouse.

Compatibility: Designed as the direct OEM replacement for Carrier FA4ANC024008AGAA air handlers. Verify your existing transformer's VA rating and primary/secondary voltages on the unit's data plate before ordering. Our fitment team is available to confirm compatibility prior to purchase — same-day shipping on all in-stock orders.