OEM Carrier Control Transformer 40VA 230V — HT01BC208 for Model 09DE084C810

This is the genuine OEM Carrier control transformer (part number HT01BC208), the factory-specified replacement for the Carrier 09DE084C810. The transformer steps down the primary line voltage to power the 24V control circuit that operates your thermostat, contactor coil, and all low-voltage safety controls. When this transformer fails, the entire control circuit goes dead — the system will not respond to the thermostat, and no heating or cooling can occur. A blown transformer is commonly caused by a shorted control wire, a failed component drawing excess current, or simple age-related insulation breakdown.

• Specs: 40VA rating | 230V primary | 115V secondary | Cross-references: 320659-301, 2-05757-1 | Factory-matched Totaline OEM unit
• OEM vs Generic: This OEM transformer is wound to exact Carrier factory tolerances, ensuring proper VA capacity and thermal protection. Undersized or generic transformers can overload and fail prematurely, risking damage to connected control boards and contactors.
• Install difficulty: 2/5 — Always disconnect power at the breaker before starting. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Photograph all wiring before disconnecting. Verify primary voltage on the unit data plate before ordering.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed for Carrier model 09DE084C810. Verify your unit's primary voltage and VA requirement on the data plate before ordering. This part is also used across Carrier, Bryant, and Payne platforms sharing the same 230V primary / 40VA specification. Questions about fitment? Our HVAC parts team confirms compatibility before you buy.