OEM Carrier Control Circuit Transformer 40VA for Model FIOP060C311GA

This is the factory OEM replacement transformer (part number HT01BD209) for the Carrier FIOP060C311GA packaged unit. The transformer steps down line voltage from 120V to 24V AC to power the entire low-voltage control circuit — including the thermostat, contactor coil, gas valve, and control board. When this transformer fails, the system goes completely unresponsive: the thermostat goes blank, no relays click, and nothing powers on. It is often the first component to check when a unit shows zero control activity despite line voltage being present.

• Specs: Input 120V AC | Output 24V AC | 40VA rated | Class 2 transformer | OEM part number HT01BD209 | Factory-matched for Carrier FIOP060C311GA
• OEM vs Generic: This OEM transformer is wound to Carrier's exact VA and impedance specifications. Generic substitutes may under-deliver VA capacity, causing nuisance tripping of the secondary fuse or erratic control board behavior under full load.
• Install difficulty: 2/5 — Shut off all power to the unit before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Label or photograph all low-voltage wire connections before disconnecting. The transformer typically mounts to the control panel with one or two screws.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed specifically for the Carrier FIOP060C311GA packaged unit. Verify your existing transformer's input/output voltage and VA rating on the data plate or component label before ordering. If your unit's 3-amp secondary fuse is also blown, replace it alongside this transformer — a shorted downstream component may have caused the original failure. Our parts specialists are available to confirm fitment before you order.