OEM Carrier Transformer 460V Primary / 230V Secondary 1564VA for Model PH4GEXA42000AA

This OEM Carrier transformer (part number HT01BC701) is the factory-specified replacement for the Carrier PH4GEXA42000AA packaged heat pump unit. This heavy-duty step-down transformer converts 460V primary power to a 230V secondary output at a robust 1564VA rating, delivering stable voltage to the unit's downstream electrical components. When this transformer fails, the result is typically a complete loss of control power — nothing responds, the thermostat goes dark, and the system will not start at all. Because it sits at the top of the electrical hierarchy, diagnosing it early saves costly misdiagnosis of downstream parts.

• Specs: 460V Primary | 230V Secondary | 1564VA Rating | OEM Part # HT01BC701 | Factory Authorized Parts (Basler Electric / Carrier OEM)
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part, wound and tested to exact OEM VA and voltage tolerances. Undersized or off-tolerance aftermarket transformers risk overheating, nuisance tripping, and premature failure of control boards and contactors downstream.
• Install difficulty: 3/5 — High-voltage work; 460V service disconnect is mandatory before beginning. Tools needed: insulated screwdrivers, wire stripper, multimeter, and appropriately rated wire connectors. Photograph all wiring connections before removal. Recommend a licensed HVAC/R technician for this repair.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered for the Carrier PH4GEXA42000AA packaged heat pump unit. Always verify your unit's data plate voltage, VA rating, and primary/secondary specifications before ordering to ensure a direct fit. Have questions? Our HVAC parts specialists verify fitment before you buy — contact us anytime.