OEM Carrier Transformer 40VA for Air Handler Model FE4ANF003T00ABAA

This is the OEM factory-replacement transformer (part number HT01CN236) for the Carrier FE4ANF003T00ABAA air handler. The transformer steps down 120V line voltage to the 24V AC signal that powers your thermostat, control board, and all low-voltage control circuits. When it fails, the entire control system goes dark — your thermostat loses power, the system stops responding to calls for heating or cooling, and no safety or operating functions will activate. It is often the first component to diagnose when nothing works at all.

• Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | Direct OEM replacement for part number HT01CN236 | Factory-matched output tolerance for reliable control circuit operation
• OEM vs Generic: OEM transformers from Carrier are wound to exact VA and voltage specifications, ensuring stable 24V output under load. Generic units may sag under full control board demand, causing nuisance lockouts, intermittent thermostat behavior, and premature board failure.
• Install difficulty: 2/5 — Disconnect power at the breaker before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Label all low-voltage wires before disconnecting. Thermal fuse on the secondary side is a common companion failure — inspect it while the panel is open.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. In-stock and ships same business day from our warehouse.

Compatibility: This transformer is the direct OEM replacement for the Carrier FE4ANF003T00ABAA fan coil air handler. Verify your existing transformer's VA rating and primary/secondary voltages on the unit data plate or component label before ordering. Our parts specialists are available to confirm fitment — reach out before you buy for complete peace of mind. Order today and your part ships same business day.