OEM Carrier Control Transformer 40VA 208/240V to 24V for Model PY3GNAA60130AA

This genuine OEM Carrier control transformer (part #HT01BD209) is the factory-specified replacement for the Carrier PY3GNAA60130AA packaged unit. The transformer steps down line voltage from 208/240V to a stable 24V AC output, powering the entire low-voltage control circuit — including the thermostat, control board, gas valve, and contactor coil. When the transformer fails, the entire system goes dark: no thermostat response, no ignition sequence, no cooling or heating whatsoever. A failed transformer is often misdiagnosed as a control board failure, making correct identification critical before ordering.

• Specs: 208/240V Primary | 24V Secondary | 40VA Capacity | 50/60Hz | Replaces HT01BD207, HT01CN232, and 9076-00
• OEM vs Generic: This is a genuine Carrier OEM part manufactured to exact factory tolerances. Generic transformers often run at reduced VA capacity under load, causing intermittent control failures and nuisance tripping of the internal thermal fuse.
• Install difficulty: 2/5 — Shut off all power at the disconnect and breaker before starting. Tools needed: multimeter (verify 0V before touching wires), flathead and Phillips screwdrivers, needle-nose pliers. Photograph all wire connections before removal. Test output voltage after installation before reassembling the cabinet.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed as the direct OEM replacement transformer for Carrier PY3GNAA60130AA packaged units. Also compatible with other Carrier, Bryant, and Payne models calling for a 208/240V–24V, 40VA control transformer. Always verify the voltage and VA rating on your unit's data plate before ordering. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy — same-day shipping available on all in-stock orders.