OEM Carrier 40VA Control Transformer for Model FIOP060301GA — Part HT01BD209

This OEM control circuit transformer is the factory-specified replacement for the Carrier FIOP060301GA packaged unit. The transformer steps down line voltage from 120V to 24V to power the low-voltage control circuit, including the thermostat, contactor coil, and control board. When this component fails, the entire control system goes dark — the thermostat becomes unresponsive, the unit will not call for heating or cooling, and no indicator lights will illuminate on the control board. It is often the first component to diagnose when nothing in the system responds.

• Specs: 40VA rating | 120V primary / 24V secondary | Factory OEM part number HT01BD209 | Designed to exact Carrier electrical tolerances
• OEM vs Generic: This OEM transformer is wound and rated to Carrier's exact VA and voltage specifications. Generic transformers may be undersized, leading to brownout conditions on the 24V circuit, nuisance tripping of the fuse, or premature control board failure.
• Install difficulty: 2/5 — Shut off all power to the unit at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Note wire colors and terminal positions before disconnecting the old transformer.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered as a direct OEM replacement for Carrier model FIOP060301GA packaged units. Always verify primary voltage and VA rating against your unit's wiring diagram before ordering. Our fitment team is available to confirm compatibility prior to purchase — same-day shipping ensures your repair stays on schedule.