OEM Carrier Control Circuit Transformer HT01BD242 for Model PH2PPB060000AA

This OEM Carrier transformer (part number HT01BD242) is the factory-specified replacement for the Carrier PH2PPB060000AA packaged heat pump unit. The transformer steps down 120V line voltage to 24V AC, powering the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When this transformer fails, the system goes completely unresponsive: the thermostat goes dark, no relays click, and the unit will not run in any mode. It is one of the first components to check during a no-power, no-response service call.

• Specs: 120V primary → 24V secondary output | 40VA rated | Factory-matched OEM windings and core | Direct plug-in or screw-terminal connections per original harness
• OEM vs Generic: This is a genuine OEM Carrier part. OEM transformers are wound and insulated to exact factory VA and voltage ratings — generic substitutes often run hot, trip thermal cutoffs prematurely, or fail within one season due to substandard core materials.
• Install Difficulty: 2/5 — Always shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter (to verify 24V output post-install), needle-nose pliers for terminal connectors. Label or photograph all low-voltage wiring before disconnecting. Installation typically takes 20–30 minutes.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Engineered as the direct OEM replacement for Carrier model PH2PPB060000AA packaged heat pump units. Always verify your existing transformer's primary voltage, secondary voltage, and VA rating against your unit's wiring diagram before ordering. Have your model and serial number ready — our HVAC parts specialists are available to confirm fitment before you buy. Order now for same-day shipping.