{"product_id":"carrier-py1pjb048090aaaa-transformer-h30291","title":"OEM Carrier 40VA Transformer 208\/240V–24V HT01BD209 for PY1PJB048090AA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer 208\/240V to 24V (HT01BD209) for Model PY1PJB048090AAAA\u003c\/h1\u003e\u003cp\u003eThe Carrier HT01BD209 is the factory-specified control transformer for the \u003cstrong\u003ePY1PJB048090AAAA\u003c\/strong\u003e packaged unit. Its job is to step down the 208\/240V line voltage to the 24V signal required by thermostats, control boards, gas valves, and contactors. When this transformer fails, the low-voltage control circuit goes dead — thermostats go blank, the system refuses to start, and no call-for-heat or cool is processed. It is one of the most straightforward and highest-impact components to diagnose and replace in the field.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input 208\/240V | Output 24V | 40VA power rating | 50\/60Hz | Factory-matched OEM tolerances\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is the genuine Carrier OEM part (HT01BD209), manufactured to exact VA and voltage tolerances. Off-brand substitutes can run hot, drop voltage under load, or fail prematurely — risking damage to connected control boards and components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Always shut off power at the disconnect before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter (verify 24V output after install). Label all low-voltage wires before disconnecting from old transformer terminals.\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 Direct OEM replacement for Carrier model \u003cstrong\u003ePY1PJB048090AAAA\u003c\/strong\u003e. Verify your unit's data plate shows a 208\/240V primary and 24V secondary requirement before ordering. Not sure it's the right part? Our HVAC parts team confirms fitment before you buy — order with confidence.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641016177011,"sku":"CARRIE-PY1PJB048090AAAA-TRANSFORMER-HT01BD209","price":55.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641016209779,"sku":"CARRIE-PY1PJB048090AAAA-TRANSFORMER-HT01BD209-GEN","price":48.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BD209_ccc50066-3280-4b26-86c1-c93f40cbf8f9.jpg?v=1775016442","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py1pjb048090aaaa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}