OEM Carrier Control Transformer 40VA 230V for Model 09DE084C100

This OEM Carrier control transformer (part #HT01BC208) is the factory-specified replacement for the Carrier 09DE084C100. The transformer steps down line voltage to the low-voltage control circuit that powers your thermostat, contactor coil, and all 24V safety controls. When the transformer fails, the entire control circuit goes dark — no thermostat response, no contactor pull-in, and no system operation whatsoever. A failed transformer is often the first suspect when a system is completely unresponsive despite having power at the disconnect.

• Specs: 40VA rating | 230V primary input | 115V secondary output | 50/60 Hz | OEM part number HT01BC208 | Cross-references: 320659-301, 2-05757-1
• OEM vs Generic: This is a genuine Carrier/Totaline OEM transformer wound to exact factory VA and voltage specifications. Generic transformers frequently underperform on VA capacity, causing nuisance trips and premature failure under high-demand control loads.
• Install difficulty: 2/5 — Shut off all power to the unit before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire stripper. Photograph existing wiring connections before disconnecting. Match wire leads to labeled terminals on the new transformer.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model 09DE084C100. Verify primary voltage and VA rating on your unit's data plate before ordering. Not sure if this is the right part? Our HVAC parts specialists confirm fitment before every order — contact us today.