OEM Carrier Control Transformer 40VA 208/230V to 24V for Model PY3GNAA24060NA

This OEM Carrier control transformer (part #HT01BD209) is the factory-specified replacement for the Carrier PY3GNAA24060NA packaged unit. The transformer steps down line-voltage power (208/230V) to the 24V low-voltage signal that drives your thermostat, control board, and all safety circuits. When this part fails, the entire control circuit goes dark — the thermostat loses power, relays won't energize, and the system produces no heating or cooling response whatsoever.

• Specs: 40VA capacity | 208/230V primary input | 24V secondary output | 50/60Hz | Class 2 control transformer | Foot-mount configuration
• OEM vs Generic: This is a genuine Carrier OEM part — factory-matched to exact VA rating and winding tolerances. Undersized or off-spec generic transformers can overheat, trip thermal cutoffs prematurely, or fail to supply adequate current to modern multi-stage control boards.
• Install difficulty: 2/5 — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label all low-voltage wires before removing the old transformer. Verify 24V output with a meter after installation before restoring power to controls.
• Warranty & Shipping: 1-year OEM factory warranty. In stock — ships same business day from our warehouse. Also replaces legacy Carrier part numbers HT01BD207, HT01CN232, and 9076-00.

Compatibility: Direct OEM replacement for Carrier model PY3GNAA24060NA packaged units. Verify your unit's data plate confirms a 208/230V primary control circuit before ordering. Need fitment confirmation? Our HVAC parts specialists verify compatibility before you buy — contact us today.