OEM Carrier 24V Control Transformer 40VA for Model PY3PNA060130AB

This is the OEM factory-replacement control transformer (part# HT01BD209) for the Carrier PY3PNA060130AB system. The transformer steps down 120V line voltage to the 24V AC signal that powers your thermostat, contactor coil, gas valve, and all low-voltage control circuits. When this part fails, the entire control circuit goes dead — symptoms include a completely blank thermostat, a system that won't respond to any call for heating or cooling, or a tripped low-voltage fuse. If your system has no 24V power and all other components test good, this transformer is almost always the culprit.

• Specs: Input 120V AC | Output 24V AC | 40VA rating | Factory-matched OEM tolerances for the Carrier PY3PNA060130AB control board
• OEM vs Generic: The OEM HT01BD209 transformer is wound and rated specifically for Carrier's control circuit demands. Generic units may run at loose VA tolerances, causing nuisance tripping of the low-voltage fuse or premature contactor coil failure.
• Install difficulty: 2/5 — Always shut off power at the breaker and disconnect the furnace switch before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter (to verify 24V output after install), needle-nose pliers for spade terminals. Label all wires before removal.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered as the direct OEM drop-in replacement for Carrier model PY3PNA060130AB. Always verify input voltage and VA rating on your unit's data plate before ordering. Have your model and serial number ready — our HVAC parts specialists are available to confirm fitment before you buy.