OEM Carrier Control Transformer 40VA 208/240V to 24V for Model PY2PNB048130AA

This OEM Carrier control transformer (part number HT01BD209) is the factory-specified replacement for the Carrier PY2PNB048130AA packaged unit. The transformer steps down the incoming 208/240V line voltage to the 24V AC signal required to power your thermostat, control board, and all low-voltage system controls. When this transformer fails, the entire control circuit goes dead — the thermostat goes blank, the system stops responding to calls for heating or cooling, and no safety faults are logged because the board itself has no power to record them.

• Specs: Input: 208/240V AC | Output: 24V AC | Power Rating: 40VA | Frequency: 50/60 Hz | OEM Part #: HT01BD209
• OEM vs Generic: This is the genuine factory OEM transformer built to Carrier's exact VA rating and insulation class. Generic transformers are often under-rated, run hot under full load, and can fail prematurely — taking connected control boards with them.
• Install difficulty: 2/5 — Always disconnect power at the breaker before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label all low-voltage wiring before disconnecting. Verify 24V output with a multimeter after installation before restoring full system power.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model PY2PNB048130AA. Always verify the part number on your unit's data plate or existing transformer label before ordering. Our technical team is available to confirm fitment — order with confidence and get your system back online fast.