OEM Carrier 40VA Control Transformer HT01BC208 for Model 09DE044C510

This is the genuine OEM Carrier control transformer (part number HT01BC208), factory-specified for the Carrier 09DE044C510 unit. The transformer steps down line voltage to power the low-voltage control circuit that operates your thermostat, contactor coil, and safety controls. When this transformer fails, the entire control circuit goes dead — your system will appear completely unresponsive, with no thermostat display, no contactor pull-in, and no response to any call for heating or cooling.

• Specs: 40VA rating | 230V primary voltage | 115V secondary voltage | 50/60 Hz | Totaline/Carrier OEM build quality | Part No. HT01BC208 (cross-references: 320659-301, 2-05757-1)
• OEM vs Generic: This is the factory-matched OEM transformer, wound to exact Carrier tolerances. Generic transformers often carry an inferior VA rating or substandard core lamination, leading to overheating and premature failure under full control-circuit load.
• Install difficulty: 2/5 — Always shut off power at the breaker before beginning. Photograph all wiring connections prior to disconnecting the old transformer. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter (to verify output voltage post-install). Most experienced DIYers complete this repair in under 30 minutes.
• Warranty: 1-year OEM manufacturer warranty. In-stock and ships same business day from our warehouse.

Compatibility: Verified direct fit for Carrier model 09DE044C510. Cross-references OEM part numbers 320659-301 and 2-05757-1. Always confirm primary and secondary voltage ratings on your unit's data plate before ordering. Need fitment assistance? Our HVAC parts specialists verify compatibility before you buy — order with confidence and get same-day shipping.