OEM Carrier 40VA Control Transformer 208/240V to 24V — HT01BD209 for Model PY3GNA060130AB

The Carrier HT01BD209 is the factory OEM control transformer for the Carrier PY3GNA060130AB packaged gas/electric unit. This transformer steps down line voltage from 208/240V to the 24V AC signal that powers your thermostat, control board, gas valve, and every other low-voltage component in the system. When this part fails, the most common symptom is a completely unresponsive system — no thermostat display, no fan, no heat, no cooling — because the 24V control circuit has lost its power source entirely.

• Specs: Input (Primary): 208/240V | Output (Secondary): 24V | Power Rating: 40VA | Frequency: 50/60 Hz | OEM Part Number: HT01BD209 | Direct replacement for HT01CN232
• OEM vs Generic: This is the factory-specified OEM transformer, matched to exact VA rating and insulation class required by Carrier. Generic transformers may run at looser tolerances, risking under-voltage to the control board and intermittent lockouts over time.
• Install difficulty: 2/5 — Disconnect all power before starting. Tools needed: flathead and Phillips screwdrivers, multimeter, wire labels. Photograph all low-voltage wiring before disconnecting from old transformer. Verify 24V output after installation before buttoning up the cabinet.
• Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.

Compatibility: Verified fit for Carrier model PY3GNA060130AB. Also fits numerous Carrier, Bryant, and Payne packaged and split systems specifying a 208/240V primary, 24V secondary, 40VA transformer — confirm your unit's data plate before ordering. Have a fitment question? Our HVAC parts specialists verify compatibility before you buy.