OEM Carrier 40VA Control Transformer 208/240V to 24V for Model PY3PPA060090NA

The Carrier HT01BD209 is the factory-specified 40VA control transformer for the PY3PPA060090NA packaged unit. This transformer steps down the 208/240V line voltage to the 24V signal voltage required by the control circuit — powering the thermostat, contactor coil, gas valve, and every other low-voltage component in your system. When the transformer fails, the entire control circuit loses power: the thermostat goes blank, the system refuses to respond to any call for heating or cooling, and nothing turns on. Replacing it with the correct OEM unit restores factory-matched electrical performance immediately.

• Specs: 208/240V primary input | 24V secondary output | 40VA power rating | 50/60 Hz | OEM part number HT01BD209
• OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances. Undersized or off-tolerance aftermarket units can overload under peak demand, blowing the secondary fuse and damaging downstream boards.
• Install difficulty: 2/5 — Disconnect all power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label or photograph all low-voltage wires before removing the old unit. Verify 24V output with a multimeter before buttoning up the panel.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered as the direct OEM replacement for Carrier model PY3PPA060090NA. Always verify your unit's data plate voltage and VA rating before ordering. Our parts specialists are available to confirm fitment — order with confidence and get your system back online today.