OEM Carrier Control Transformer 40VA for Model FIOP060C301GA — Part HT01BD209

This OEM Carrier transformer (part number HT01BD209) is the factory-specified replacement for the FIOP060C301GA packaged unit. The transformer steps down 120V line voltage to the 24V signal required by your thermostat, contactor coil, and control board. When this component fails, the entire control circuit loses power — resulting in a completely unresponsive system, a blank thermostat display, or tripped low-voltage fuses with no obvious cause. It is often one of the first components to check when nothing responds at all.

• Specs: 40VA rating | 120V primary / 24V secondary | Class 2 output | OEM part number HT01BD209 | Factory-matched for Carrier FIOP060C301GA packaged systems
• OEM vs Generic: This is a genuine Carrier OEM transformer wound to exact VA and impedance specifications. Generic transformers may be undersized in VA rating, causing premature thermal cutout trips under normal control-circuit load — especially in systems with multiple accessories or zone controllers.
• Install difficulty: 2/5 — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter, and wire nuts or spade terminals. Photograph all wiring connections before removing the old unit. Confirm 24V output with a multimeter before reassembling the panel.
• Warranty: 1-year OEM factory warranty. In-stock units ship same business day from our warehouse when ordered before 3PM local time.

Compatibility: Designed for the Carrier FIOP060C301GA packaged unit. Always verify voltage markings and VA rating on your existing transformer's label before ordering to confirm a direct match. Not sure if this is the right part? Our HVAC parts specialists confirm fitment before you buy — contact us before placing your order.