OEM Carrier Control Transformer 40VA 208/240V to 24V for Model PY3GNA048130AB

This is the genuine OEM Carrier control transformer (part #HT01BD209) factory-specified for the Carrier PY3GNA048130AB packaged unit. The transformer steps line voltage (208/240V) down to the 24V used by your thermostat, control board, contactor coil, and every low-voltage safety circuit in the system. When this transformer fails, the entire control circuit goes dark — nothing responds, the thermostat goes blank, and the system will not start. A failed transformer is often misdiagnosed as a bad control board, making correct identification critical before replacing more expensive components.

• Specs: 208/240V primary | 24V secondary | 40VA rated | 50/60Hz | Weight approx. 1.3 lbs | Also replaces HT01BD207, HT01CN232, and 9076-00
• OEM vs Generic: The OEM HT01BD209 is factory-wound to exact VA and impedance tolerances for Carrier systems. Undersized or off-tolerance aftermarket transformers can trip repeatedly or fail prematurely under full 24V control-circuit load.
• Install difficulty: 2/5 — Disconnect all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Always verify 0V at primary leads before handling. Photo-document all wire connections before removal.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse — no waiting weeks for a direct-from-supplier order.

Compatibility: Designed as the direct OEM replacement for Carrier PY3GNA048130AB packaged units. Verify your unit's data plate shows 208/240V primary voltage before ordering. Our fitment team is available to confirm compatibility before you buy — no guesswork, no return shipping headaches.