OEM Carrier 40VA Control Transformer HT01BD209 for Model PY2PNB024060NB

This OEM control transformer (part number HT01BD209) is the factory-specified replacement for the Carrier PY2PNB024060NB packaged unit. The transformer steps down 120V line voltage to the 24V signal used by your thermostat, contactor coil, and control board. When it fails, the entire low-voltage control circuit goes dead — the thermostat goes blank, the system won't respond to any call for heat or cool, and in some cases a tripped fuse on the board is the only clue that the transformer has shorted.

• Specs: Primary: 120V AC | Secondary: 24V AC | VA Rating: 40VA | Factory-matched OEM form, fit, and function
• OEM vs Generic: OEM transformers like this HT01BD209 are wound to the factory's exact VA tolerance, protecting connected boards and coils from voltage sag under load. Generic alternatives may be under-rated for VA draw, causing nuisance tripping or premature board failure.
• Install difficulty: 2/5 — Shut off all power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdrivers, multimeter (to verify 24V output after install), wire stripper. Label or photograph all low-voltage wiring before disconnecting from the board.
• Warranty: 1-year OEM factory warranty. In-stock units ship same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier PY2PNB024060NB packaged unit. Always verify the VA rating and primary/secondary voltage on your existing transformer's label before ordering. Our fitment team is available to confirm compatibility before you purchase — reach out via chat or phone.