OEM Carrier Control Transformer 75VA 208/240/480V–24V for Model PH2PPB048000AA

This is the factory OEM replacement control transformer (part # HT01BD242) for the Carrier PH2PPB048000AA packaged heat pump unit. The transformer steps down high-voltage primary power (208/240/480V) to the 24V AC signal used by the thermostat, contactor coils, control board, and all low-voltage safety circuits. When this transformer fails, the entire control circuit goes dead — the thermostat goes blank, the contactor will not energize, and the system will not respond to any call for heating or cooling. It is one of the first components to inspect any time a system shows zero low-voltage activity.

• Specs: 75VA rating | Primary: 208/240/480V | Secondary: 24VAC | 50/60 Hz dual frequency | Foot-mount configuration | OEM part number HT01BD242
• OEM vs Generic: This is the genuine Carrier factory part, matched to exact VA capacity and terminal configuration for the PH2PPB048000AA. Generic transformers often carry ±10% VA tolerances that can overload under peak demand, shortening the lifespan of downstream components.
• Install difficulty: 2/5 — Always shut off power at the disconnect and verify voltage is absent before touching any wiring. Tools needed: flathead and Phillips screwdrivers, multimeter, wire labels or tape. Photograph or diagram all wiring connections before disconnecting the old transformer.
• Warranty: 1-year OEM factory warranty. In-stock units ship same business day from our warehouse.

Compatibility: Designed for the Carrier PH2PPB048000AA packaged heat pump unit. This transformer is also used across Carrier, Bryant, Payne, and ICP family equipment that specifies a 75VA foot-mount transformer with 208/240/480V primary and 24V secondary — always verify your unit's data plate and existing transformer label before ordering. Questions about fitment? Our HVAC parts specialists confirm compatibility before you buy.