OEM Carrier Transformer 120V–24V 40VA for Model PY2PPB060115NB

This is the factory-specified OEM replacement transformer (part number HT01BD209) for the Carrier PY2PPB060115NB packaged heating and cooling unit. The transformer steps down 120V line voltage to the 24V AC signal that powers your control board, thermostat, and all low-voltage switching circuits. When the transformer fails, the entire control circuit loses power — the thermostat goes blank, no call for heat or cool is recognized, and the system enters a full lockout condition with no error codes displayed.

• Specs: Primary: 120V AC | Secondary: 24V AC | VA Rating: 40VA | Factory-matched output tolerance for Carrier control boards | Designed for packaged unit control circuits
• OEM vs Generic: OEM transformers like this HT01BD209 are wound and tested to Carrier's exact VA rating and insulation class. Generic alternatives often run at reduced VA capacity, causing voltage sag under load that can damage control boards or cause erratic thermostat behavior.
• Install difficulty: 2/5 — Always disconnect power at the breaker and verify voltage is zero before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label and photograph existing wiring connections before removal. Verify 24V output with a multimeter after installation before restoring full system power.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. In-stock and ships same business day from our warehouse.

Compatibility: Engineered as a direct OEM drop-in replacement for the Carrier PY2PPB060115NB packaged unit. Always confirm your unit's control voltage and VA rating on the data plate before ordering. Our HVAC parts specialists are available to verify fitment — order with confidence.