{"product_id":"carrier-py3ppa048090ab-transformer-h30291","title":"OEM Carrier 40VA Transformer HT01BD209 for PY3PPA048090AB","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD209 for Model PY3PPA048090AB\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer is the factory-specified replacement for the \u003cstrong\u003eCarrier PY3PPA048090AB\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V signal voltage required to power the thermostat, control board, and all low-voltage safety circuits. When it fails, the entire control circuit goes dark — the thermostat goes blank, the system won't respond to any calls for heating or cooling, and nothing works. It is one of the first components to inspect when troubleshooting a completely unresponsive unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Factory-matched OEM part number HT01BD209 | Quick-connect or screw terminal leads depending on production date\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine OEM Carrier transformer built to exact VA, voltage, and thermal-overload specifications. Generic substitutes often carry lower VA ratings or inferior thermal protection, risking repeated failure or downstream control board damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Always disconnect power at the breaker before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Photograph or label all wiring before removal. Discharge any residual voltage and confirm primary\/secondary terminals match before energizing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for Carrier model \u003cstrong\u003ePY3PPA048090AB\u003c\/strong\u003e packaged gas\/electric units. Always verify the part number on your existing transformer's label and cross-reference with your unit's data plate before ordering. Our HVAC parts specialists are available to confirm fitment prior to purchase — we want to make sure you get the right part the first time.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640354066803,"sku":"CARRIE-PY3PPA048090AB-TRANSFORMER-HT01BD209","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640354099571,"sku":"CARRIE-PY3PPA048090AB-TRANSFORMER-HT01BD209-GEN","price":30.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BD209_83a751c3-ca53-476e-8d5c-e3f9ed3d1328.jpg?v=1775016626","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3ppa048090ab-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}