OEM Carrier Control Transformer 75VA 208/240/480V → 24VAC for Model PH2PNB048000AB

This OEM Carrier transformer (part #HT01BD242) is the factory-specified replacement for the Carrier PH2PNB048000AB packaged heat pump unit. The control transformer steps high-voltage line power (208/240/480V) down to the 24VAC signal voltage that powers every low-voltage control circuit in your system — the thermostat, contactor coils, control board, and safety switches. When this transformer fails, the entire unit goes dark: no thermostat response, no contactor pull-in, and no error codes, since the board itself has no power to report a fault.

• Specs: Input 208/240/480VAC | Output 24VAC | Power Rating: 75VA | Frequency: 50/60Hz | Foot-mount configuration | OEM Part #HT01BD242
• OEM vs Generic: This is the genuine Carrier OEM transformer, wound and potted to exact factory specifications. Generic equivalents often use thinner winding wire and lower-grade core laminations, leading to thermal overload and premature burnout under continuous HVAC duty cycles.
• Install difficulty: 2/5 — Disconnect all power and verify zero voltage with a multimeter before starting. Tools needed: flathead and Phillips screwdrivers, ¼" nut driver, needle-nose pliers, multimeter. Photograph all wire connections before removing the old unit. Secure the foot-mount bracket firmly before reconnecting.
• Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day from our warehouse when ordered by cutoff time.

Compatibility: Factory-matched replacement for the Carrier PH2PNB048000AB packaged heat pump. Also fits a broad range of Carrier, Bryant, and Payne AC, furnace, and RTU applications requiring a 75VA 208/240/480V primary to 24V secondary foot-mount transformer. Always verify your unit's data plate voltage and VA rating before ordering. Our fitment specialists are available to confirm compatibility — contact us before you buy.