OEM Carrier Control Transformer 40VA 208/240V to 24V for Model PY2PPB048130AB

This OEM control transformer (part# HT01BD209) is the factory-specified replacement for the Carrier PY2PPB048130AB packaged HVAC unit. The transformer steps down high-voltage line power (208/240V) to the 24V DC signal required by your system's control board, thermostat wiring, and low-voltage components. When the transformer fails, the entire control circuit loses power — the result is a completely unresponsive system: no heat, no cooling, and no thermostat communication. If your system appears completely dead despite confirmed line-voltage power at the unit, a failed transformer is one of the first components to test.

• Specs: 208/240V primary input | 24V secondary output | 40VA power rating | 50/60 Hz | Factory OEM part# HT01BD209
• OEM vs Generic: OEM transformers are wound and tested to exact Carrier factory tolerances, ensuring stable 24V output under full VA load. Generic units often deliver inconsistent secondary voltage, causing nuisance lockouts, board resets, or premature control board failure.
• Install difficulty: 2/5 — Always disconnect power at the breaker before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter, needle-nose pliers. Photograph all wiring connections before removing the old transformer. Verify output voltage 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: Directly fits Carrier model PY2PPB048130AB. Verify your unit's data plate matches the 208/240V primary and 24V secondary spec before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — order with confidence.