OEM Carrier Control Transformer 40VA 208/240V to 24V for Model PY3GNA036060AB

This OEM control transformer (part# HT01BD209) is the factory-specified replacement for the Carrier PY3GNA036060AB packaged unit. The transformer steps down 208/240V line voltage to 24V to power the entire low-voltage control circuit — including the thermostat, contactor coil, and all safety controls. When this part fails, the result is a complete loss of control power: the thermostat goes blank, the system won't respond to any calls for heating or cooling, and you may measure 0V at the secondary terminals on a multimeter.

• Specs: 208/240V Primary | 24V Secondary | 40VA rated | 50/60Hz | Replaces HT01BD207, HT01CN232, 9076-00
• OEM vs Generic: The OEM HT01BD209 is wound to exact factory VA and voltage tolerances, protecting downstream control boards and contactors. Generic transformers rated at nominal 40VA can run hot under full load and shorten the life of sensitive electronic controls.
• Install difficulty: 2/5 — Disconnect all power before servicing. Tools needed: multimeter, flathead and Phillips screwdrivers, wire stripper. Label all wiring connections before disconnecting. Verify 0V at primary terminals before touching any wiring.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier PY3GNA036060AB packaged unit. Cross-references: HT01BD207, HT01CN232, 4000A46E07AE28, and 9076-00. Always confirm your unit's data plate voltage matches 208/240V primary before ordering. Our fitment team is available to verify compatibility before you buy — order with confidence and get back up and running today.