OEM Carrier Control Transformer 40VA 208/230V to 24V for Model PY3PPA060090NB

This genuine OEM control transformer (part #HT01BD209) is the factory-specified replacement for the Carrier PY3PPA060090NB packaged unit. The transformer steps down 208/230V line voltage to the 24V DC signal that powers your thermostat, control board, and all low-voltage control circuits. When this part fails, the entire control circuit goes dark — resulting in a completely unresponsive thermostat, no system call, or tripped secondary fuses. Replacing it with the correct OEM unit restores reliable voltage conversion immediately.

• Specs: 40VA rated | 208/230V primary input | 24V secondary output | 50/60 Hz | Replaces superseded part numbers HT01BD207, HT01CN232, and 9076-00
• OEM vs Generic: OEM transformers are wound to exact Carrier factory tolerances, ensuring stable 24V output under full VA load. Generic units may deliver inconsistent secondary voltage, causing nuisance lockouts, board resets, or premature control board failure.
• Install difficulty: 2/5 — Shut off all power at the disconnect before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter to verify 24V output post-install. Photograph all wiring connections before disconnecting. Mount to existing bracket and reconnect primary and secondary leads to matching terminals.
• Warranty: 1-year OEM factory warranty. Ships same business day from our stocked warehouse.

Compatibility: Designed for the Carrier PY3PPA060090NB packaged gas/electric unit. Also fits Bryant and Payne models using the same transformer footprint — verify your data plate shows 208/230V primary input before ordering. Our fitment team is available to confirm compatibility before you buy. Order now — in stock and ships today.