OEM Carrier Transformer 75VA 208/240/480V to 24V for Model PH2PJB048000AA

This OEM Carrier transformer (part #HT01BD242) is the factory-specified control-circuit transformer for the Carrier PH2PJB048000AA packaged heat pump unit. The transformer steps down high-voltage line power (208/240/480V primary) to the 24V AC signal that energizes your thermostat, contactor coil, control board, and all low-voltage safety circuits. When it fails, the entire control circuit goes dead — the thermostat goes blank, the system refuses to start, and no low-voltage components respond. Replacing a failed transformer is one of the most straightforward repairs you can make to restore full system function.

• Specs: 75VA rating | 208/240/480V primary | 24VAC secondary | 50/60 Hz | Foot-mount configuration | OEM part #HT01BD242
• OEM vs Generic: This is a genuine Carrier OEM transformer wound to exact factory VA and voltage tolerances. Generic aftermarket transformers often run under-rated VA, causing premature thermal cutout trips and nuisance lockouts under full control-circuit load.
• Install difficulty: 2/5 — Shut off all power at the disconnect and breaker before touching any wiring. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24VAC output after install). Always photograph or label all low-voltage wiring before disconnecting. The foot-mount bracket makes secure panel mounting straightforward.
• Warranty: 1-year OEM factory warranty. In-stock orders ship same business day from our warehouse.

Compatibility: Factory-matched replacement for the Carrier PH2PJB048000AA packaged heat pump unit. This transformer is also used across a broad range of Carrier, Bryant, Payne, Tempstar, and Heil HVAC equipment — always verify your unit's data plate voltage and VA requirements before ordering. Our fitment team is available to confirm compatibility before you buy.