OEM Carrier 40VA Control Transformer 208/240V to 24V for Model PY2PPB060090AB

This is the OEM factory-specified control transformer for the Carrier PY2PPB060090AB packaged unit. The transformer steps high-voltage line power (208/240V) down to the 24V signal used by the thermostat, control board, and all low-voltage switching components. When this part fails, the entire control circuit goes dark — the thermostat becomes unresponsive, staging relays won't energize, and the system will not start at all. A shorted secondary or open primary winding is one of the most common causes of a completely dead HVAC system, making this a critical first-check component during a no-response service call.

• Specs: Input 208/240V | Output 24V | 40VA power rating | 50/60 Hz | OEM Part# HT01BD209 | Factory-matched winding tolerance
• OEM vs Generic: OEM transformers are wound and insulated to Carrier's exact factory specification, ensuring stable 24V output under full control-circuit load. Generic units often use under-rated VA cores that run hot and fail prematurely, especially in packaged unit enclosures with elevated ambient temperatures.
• Install Difficulty: 2/5 — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter, needle-nose pliers. Always verify 0V at line terminals before touching wiring. Photograph all connections before removal.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered for the Carrier PY2PPB060090AB packaged unit. Verify your unit's data plate shows 208/240V primary input and 24V secondary before ordering. Our fitment specialists are available to confirm compatibility before you buy — order with confidence from NationalHVACParts.com.