OEM Carrier Control Transformer 40VA 208/240V to 24V — Part HT01BD209 for Model PY3PPA060090AB

This is the genuine OEM Carrier control transformer (part# HT01BD209), factory-specified for the Carrier PY3PPA060090AB packaged unit. The transformer steps down high-voltage line power (208/240V) to the 24V low-voltage signal that energizes your thermostat, control board, and all safety circuits. When it fails, the entire control circuit goes dark — your thermostat loses power, the system refuses to respond to any command, and you may hear faint buzzing or humming near the air handler. Replacing this transformer with the correct OEM part restores full system communication instantly.

• Specs: 40VA rating | 208/240V primary input | 24V secondary output | 50/60Hz | Genuine Carrier OEM part# HT01BD209 | Also replaces HT01BD207, HT01CN232, and 9076-00
• OEM vs Generic: This is the factory-original Carrier transformer — matched to exact VA rating, insulation class, and mounting footprint. Generic aftermarket units often carry loose VA tolerances that cause control boards to brown-out under peak demand, shortening board life.
• Install difficulty: 2/5 — Shut off all power to the unit at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter (to confirm 0V before touching terminals). Label all wires before disconnecting. Swap primary and secondary leads to matching terminals and restore power to verify 24V output before closing the cabinet.
• Warranty: 1-year OEM manufacturer warranty against defects. Orders placed by 3PM local time ship same business day from our warehouse.

Compatibility: Designed for the Carrier PY3PPA060090AB packaged unit. Cross-references: HT01BD207, HT01CN232, 9076-00. Always verify your unit's data plate VA rating and primary voltage before ordering. Our fitment team is available to confirm compatibility — reach out before you buy if you have any questions.