OEM Carrier Control Transformer 75VA 208/240/480V → 24VAC for Model PH2PNB036000AA

This OEM Carrier transformer (part #HT01BD242) is the factory-specified replacement for the Carrier PH2PNB036000AA heat pump. The transformer steps down high-voltage power — 208, 240, or 480V primary — to the 24VAC signal that energizes the entire low-voltage control circuit: thermostat, contactor coil, reversing valve, and safety controls. When this transformer fails, nothing works — the system will not respond to any thermostat calls for heating or cooling, and fuses or breakers in the low-voltage circuit may trip repeatedly.

• Specs: 75VA power rating | 208/240/480V primary input | 24VAC secondary output | 50/60Hz | Foot-mount design | Factory-matched to Carrier PH2PNB036000AA specifications
• OEM vs Generic: OEM transformers maintain tight VA and voltage tolerances, protecting sensitive controls downstream. Generic units can run under-rated VA, causing thermal overload and premature failure — especially under high-demand multi-stage systems.
• Install difficulty: 3/5 — Requires disconnecting line voltage. Always shut off power at the breaker and verify zero voltage with a multimeter before proceeding. Label all low-voltage wiring before removal. Tools needed: screwdrivers (flathead and Phillips), wire stripper, needle-nose pliers, multimeter.
• Warranty: 1-year OEM factory warranty. In stock — ships same business day from our warehouse.

Compatibility: Designed for the Carrier PH2PNB036000AA heat pump. The HT01BD242 is also used across Carrier, Bryant, Payne, and ICP family equipment with matching 208/240/480V → 24VAC 75VA transformer specifications — always verify your unit's data plate voltage and VA rating before ordering. Questions about fitment? Our HVAC parts specialists verify compatibility before you buy.