OEM Carrier Control Transformer 40VA 208/240V to 24V for Model PY2PPB042060NB

This OEM Carrier transformer (part #HT01BD209) is the factory-specified control voltage transformer for the Carrier PY2PPB042060NB packaged HVAC unit. Its job is critical: it steps down the 208/240V line voltage to the 24V AC signal that powers the thermostat, control board, contactor coil, and every other low-voltage safety and switching circuit in the system. When the transformer fails — from age, a shorted control circuit, or a voltage spike — the entire control system goes dark. Symptoms include a completely unresponsive thermostat, a system that won't respond to any call for heating or cooling, or a blown fuse that returns immediately after replacement.

• Specs: Input 208/240V | Output 24V | 40VA power rating | 50/60Hz | OEM part number HT01BD209 | Factory-matched for Carrier PY2PPB042060NB
• OEM vs Generic: The OEM transformer is wound and insulated to Carrier's exact VA rating and thermal tolerance. Undersized aftermarket units can run hot, trip thermal protection prematurely, and leave control circuits underpowered under full load.
• Install Difficulty: 2/5 — Shut off power at the disconnect and verify voltage is zero before touching any wiring. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Always photograph or label existing wire connections before removing the old transformer.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed as the direct OEM replacement for Carrier PY2PPB042060NB packaged units. Verify your unit's data plate shows a 208/240V primary and 24V secondary control circuit before ordering. Not sure about fitment? Our HVAC parts specialists will confirm compatibility before you buy — call or chat today.