OEM Carrier Control Transformer 40VA 230/115V for Model 09DE064510

This is the factory OEM replacement transformer (part number HT01BC208) for the Carrier 09DE064510. The control transformer steps down line voltage to power the 24V control circuit that operates the thermostat, contactor coils, and safety safeties throughout your system. When this transformer fails, the entire control circuit goes dead — the thermostat goes blank, the system refuses to respond to any call for heating or cooling, and no low-voltage components receive power. A blown fuse on the secondary side is often the first clue; if replacing the fuse doesn't hold, the transformer itself is typically the culprit.

• Specs: 40VA capacity | 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 OEM transformer wound to exact factory VA and voltage tolerances. Generic aftermarket transformers frequently underperform on VA rating, causing nuisance tripping and premature burnout of the secondary winding under full control-circuit load.
• Install difficulty: 2/5 — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter, wire nuts. Label all wiring before disconnecting. Verify primary and secondary voltages with a multimeter after installation before re-energizing the full system.
• Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for use in Carrier model 09DE064510. Always verify your unit's data plate primary input voltage and VA requirement before ordering. If you are unsure of fitment, our HVAC parts specialists are available to confirm compatibility before you purchase — ensuring you get the right part the first time.