OEM Carrier 40VA Control Transformer 208/240V to 24V for Model PY3PNA060130NA

This OEM Carrier control transformer (part #HT01BD209) is the factory-specified replacement for the Carrier PY3PNA060130NA packaged unit. The transformer steps down high-voltage supply power (208/240V) to the 24V low-voltage signal used by the thermostat, control board, and all safety circuits. When this part fails, the entire control circuit goes dead — the thermostat goes blank, the unit refuses to start, and fuses in the low-voltage circuit may blow repeatedly. If your system shows zero response to thermostat commands, this transformer is one of the first components to test.

• Specs: Input 208/240V | Output 24V | 40VA power rating | 50/60 Hz | OEM part number HT01BD209 | Factory-matched performance
• OEM vs Generic: OEM transformers are wound to exact factory VA and voltage tolerances, protecting sensitive control boards from under-voltage or voltage spike damage. Generic units with loose tolerances can cause nuisance tripping or shorten board life.
• Install difficulty: 2/5 — Turn off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label all low-voltage wires before disconnecting. Confirm input and output voltages with a multimeter after installation before restoring full power.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PY3PNA060130NA packaged unit. Verify input voltage on your unit's data plate — this transformer supports both 208V and 240V primary configurations. Not sure if this is the right part? Our HVAC parts specialists verify fitment before you order — contact us today and ship with confidence.