OEM Carrier Control Transformer 40VA 208/230V–24V for Model PY3GPAA60130AA

This genuine OEM Carrier control transformer (part #HT01BD209) is the factory-specified replacement for the Carrier PY3GPAA60130AA packaged unit. The transformer steps down 208/230V line voltage to 24V AC to power the low-voltage control circuit — including the thermostat, contactor coil, gas valve solenoid, and control board. When this transformer fails, the entire system goes dark: the thermostat loses power, nothing responds to calls for heating or cooling, and no fault codes appear on the board. A failed transformer is often misdiagnosed as a board failure, making correct identification critical before ordering.

• Specs: 208/230V primary | 24V secondary | 40VA rating | 50/60 Hz | Part # HT01BD209 | Also replaces HT01BD207, HT01CN232, and 9076-00
• OEM vs Generic: This is a genuine Carrier OEM transformer, wound to exact factory VA and voltage tolerances. Undersized or off-spec generic transformers can overheat, trip internal breakers, or cause nuisance faults on sensitive control boards.
• Install difficulty: 2/5 — Turn off power at the disconnect before starting. Tools needed: flathead and Phillips screwdrivers, wire nuts or spade connectors, multimeter. Label all wire connections before removal. Verify 24V output with a meter after installation before closing the panel.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse — get your system back online fast.

Compatibility: Fits Carrier model PY3GPAA60130AA packaged units. Verify input voltage (208V or 230V) on your unit's data plate before ordering. Cross-reference part numbers HT01BD207, HT01CN232, and 9076-00 are confirmed factory supersessions. Questions about fitment? Our HVAC parts team verifies compatibility before you order — call or chat today.