OEM Carrier Control Transformer 40VA 230V/115V for Model 09DE064C510

This OEM Carrier control transformer (part #HT01BC208) is the factory-specified replacement for the Carrier 09DE064C510. The transformer steps voltage down from the primary supply side to power the low-voltage control circuit that operates contactors, relays, thermostats, and safety switches. When this transformer fails, the entire control circuit goes dead — the system will not respond to the thermostat, and nothing will operate. A faulty transformer is often the cause of a completely unresponsive HVAC system even when line voltage is confirmed present.

• Specs: 40VA rating | 230V primary / 115V secondary | 50/60 Hz | OEM part number HT01BC208 | Cross-references: 320659-301, 2-05757-1
• OEM vs Generic: This is a genuine Totaline/Carrier OEM transformer wound to exact factory VA and voltage tolerances. Aftermarket transformers often run undersized VA ratings, causing premature burnout — especially on systems with high control-circuit loads.
• Install difficulty: 2/5 — Disconnect all power before servicing. Tools needed: multimeter, insulated screwdrivers, wire nuts or spade connectors. Verify primary and secondary voltages with a meter before and after installation. Label or photograph all wiring connections before disconnecting.
• Warranty: 1-year OEM manufacturer warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed for Carrier model 09DE064C510. Always verify the primary voltage (230V), secondary voltage (115V), and VA rating (40VA) against your unit's data plate before ordering to ensure a correct fit. Our parts team is available to confirm compatibility before you buy — ships same day, no hassle.