OEM Carrier Control Transformer 75VA 208/240/480V to 24VAC for Model PH1PNB030000AAAA

This is the factory OEM replacement control transformer for the Carrier PH1PNB030000AAAA packaged heat pump unit. The transformer steps down high-voltage supply power (208, 240, or 480V primary) to the 24VAC 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 system will not respond to the thermostat, no contactors will pull in, and no heating or cooling will occur. In multi-voltage commercial applications, this 75VA unit provides the additional capacity needed to power all low-voltage loads simultaneously without overheating.

• Specs: 75VA power rating | Primary input: 208/240/480VAC | Secondary output: 24VAC | Frequency: 50/60Hz | Foot-mount configuration | OEM part number: HT01BD242
• OEM vs Generic: OEM transformers are wound to exact Carrier factory tolerances, ensuring stable 24V output under full load. Undersized or off-tolerance aftermarket transformers can cause erratic control board behavior, nuisance lockouts, and premature contactor coil failure.
• Install difficulty: 2/5 — Shut off all power to the unit and verify zero voltage before beginning. Tools needed: multimeter, flathead and Phillips screwdrivers, wire stripper, needle-nose pliers. Label all low-voltage wires before disconnecting. Confirm primary tap matches your supply voltage before energizing.
• Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day from our warehouse.

Compatibility: Fits Carrier model PH1PNB030000AAAA packaged heat pump unit. Also used across Carrier, Bryant, Payne, Tempstar, and Heil equipment sharing the HT01BD242 specification. Always verify supply voltage matches the transformer's primary tap before ordering. Our team is available to confirm fitment prior to purchase.