OEM Carrier Control Transformer 40VA 230V/115V — HT01BC208 for Model 09DE084C610

This is the factory OEM replacement control transformer for the Carrier 09DE084C610, sourced directly from Totaline/Carrier. The transformer steps down line voltage to power the 24V control circuit that governs your thermostat, contactor, gas valve, and all low-voltage safety controls. When it fails, the entire system goes silent — no thermostat response, no fan, no heat or cooling — because the control circuit loses its power source entirely.

• Specs: 40VA rating | 230V primary voltage | 115V secondary voltage | 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 built to exact factory VA and voltage tolerances. Undersized or off-tolerance aftermarket transformers can trip internal thermal fuses prematurely or fail to hold voltage under full control-circuit load, leading to nuisance lockouts.
• Install difficulty: 3/5 — Always shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, wire stripper, multimeter. Photograph all wire connections before removal. Verify primary and secondary voltages with a multimeter after install before restoring full power.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our NationalHVACParts.com warehouse.

Compatibility: Designed as a direct OEM replacement for the Carrier 09DE084C610. Always verify the VA rating and primary/secondary voltages on your existing transformer's label before ordering to confirm fitment. Have questions about compatibility? Our HVAC parts specialists verify fitment before you order — contact us today.