OEM Carrier 40VA Control Transformer for Model FE5ANB004T00ABAA

This OEM replacement transformer (part number HT01CN236) is the factory-specified control transformer for the Carrier FE5ANB004T00ABAA air handler. The transformer steps down 120V line voltage to 24V AC to power the low-voltage control circuit — including the thermostat, relay coils, and control board. When the transformer fails, the entire control circuit loses power: the thermostat goes blank, nothing responds to calls for heating or cooling, and the system appears completely dead. A failed transformer is often caused by a short in the low-voltage wiring, so inspect all 24V wiring before installing the replacement.

• Specs: 40VA rated | 120V primary / 24V secondary | OEM part number HT01CN236 | Factory-matched output for reliable low-voltage control circuit operation
• OEM vs Generic: This OEM transformer is wound to exact factory VA and voltage specifications. Generic aftermarket transformers frequently under-deliver on VA rating, causing brownouts on the control circuit that lead to erratic thermostat behavior and premature board failures.
• Install difficulty: 2/5 — Shut off all power to the air handler at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Verify 0V at primary terminals before touching wiring. Label or photograph all wire connections prior to removal.
• Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our stocked warehouse.

Compatibility: Designed as a direct OEM replacement for Carrier model FE5ANB004T00ABAA air handlers. Always verify your existing transformer's VA rating and primary/secondary voltages on the unit data plate before ordering. Have your model and serial number handy — our fitment team is available to confirm compatibility before you purchase.