OEM Carrier Control Transformer 40VA 208/230V to 24V for Model PY3GPAA36060NA

This OEM Carrier control transformer (part #HT01BD209) is the factory-specified replacement for the Carrier PY3GPAA36060NA packaged unit. The transformer steps down line voltage from 208/230V to the 24V control circuit that powers your thermostat, control board, gas valve, and all low-voltage system logic. When this transformer fails, the entire system goes dark — no thermostat response, no staging, no heat or cool — because every control signal in the unit depends on its 24V output.

• Specs: 40VA rating | 208/230V primary input | 24V AC secondary output | 50/60 Hz | Replaces HT01BD207, HT01CN232, 4000A46E07AE28, and 9076-00
• OEM vs Generic: This is a genuine Carrier OEM transformer wound to exact VA and voltage tolerances. Generic transformers often run hot under full control-circuit load, leading to nuisance tripping of the internal thermal fuse and premature failure.
• Install difficulty: 2/5 — Shut off all power at the breaker and disconnect switch before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Always verify 0V at primary terminals before touching wiring. Photograph all wire connections before disconnecting.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model PY3GPAA36060NA. Also compatible with Bryant and Payne units sharing the same control circuit specification. Verify 208/230V primary voltage on your unit's data plate before ordering. Our team is available to confirm fitment — reach out before you buy if you have any questions.