OEM Carrier Control Transformer 75VA 200/230/460V → 24V for Model PH2PNB024000AC

This OEM Carrier control transformer (part #HT01BD242) is the factory-specified replacement for the Carrier PH2PNB024000AC packaged heat pump system. The transformer steps down high-voltage supply power to the 24V AC signal that energizes every low-voltage control circuit in your system — including the thermostat, contactor coil, reversing valve solenoid, and control board. When this transformer fails, the entire control circuit goes dark: the thermostat loses power, the system refuses to respond to any commands, and you may detect a faint buzzing or burning smell near the air handler section.

• Specs: 75VA capacity | Primary: 200/230/460V multi-tap | Secondary: 24V AC | 50/60Hz | Foot-mount configuration | OEM part #HT01BD242
• OEM vs Generic: This is a genuine Carrier OEM transformer wound to factory tolerances. Generic transformers may be under-rated for 75VA continuous loads, leading to overheating, nuisance trips, and premature failure — especially in commercial packaged units with high control-circuit demand.
• Install Difficulty: 3/5 — Shut off all power at the disconnect and breaker before proceeding. Tools needed: multimeter (verify 24V output after install), 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: Engineered as a direct OEM replacement for the Carrier PH2PNB024000AC packaged heat pump unit. Also fits select Carrier air conditioners, furnaces, and other packaged RTU models requiring a 75VA, 24V secondary control transformer with foot-mount configuration. Always verify your unit's supply voltage matches the correct primary tap before installation. Have questions about fitment? Our HVAC parts specialists verify compatibility before you order — in stock and ready to ship today.