{"product_id":"carrier-py3pna036090na-transformer-h30291","title":"OEM Carrier Control Transformer 40VA 208\/240V for PY3PNA036090NA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 208\/240V to 24V for Model PY3PNA036090NA\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part #HT01BD209) is the factory-specified replacement for the \u003cstrong\u003eCarrier PY3PNA036090NA\u003c\/strong\u003e packaged unit. The transformer steps down the 208\/240V line voltage to the 24V signal used by your thermostat, contactor coil, and control board. When this part fails, the entire low-voltage control circuit goes dark — the system will not respond to thermostat calls for heat or cool, and no error codes may even appear since the board itself loses power.\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 OEM part number HT01BD209 | Carrier-matched construction and insulation class\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound and insulated to exact Carrier factory tolerances, ensuring stable 24V output under full-load conditions. Generic units may produce voltage sag under load, causing erratic contactor chatter, nuisance lockouts, or premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Always disconnect power at the disconnect box before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter (to verify 24V output post-install), wire nuts or spade connectors. Photograph or label all low-voltage wiring before disconnecting the old transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. 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 the Carrier \u003cstrong\u003ePY3PNA036090NA\u003c\/strong\u003e packaged unit. Verify input voltage on your unit's data plate (208V or 240V) before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — order with confidence and get back to comfort fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640389292403,"sku":"CARRIE-PY3PNA036090NA-TRANSFORMER-HT01BD209","price":55.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640389325171,"sku":"CARRIE-PY3PNA036090NA-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_5f58b1f6-0c79-4cbf-9395-c2bf51bfaa9a.jpg?v=1775025577","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3pna036090na-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}