{"product_id":"carrier-py3ppa036090aa-transformer-h30291","title":"OEM Carrier Transformer 40VA 208\/240V–24V for PY3PPA036090AA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer 208\/240V to 24V — Model PY3PPA036090AA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part #HT01BD209) is the factory-specified control circuit transformer for the \u003cstrong\u003eCarrier PY3PPA036090AA\u003c\/strong\u003e packaged unit. Its job is to step down line voltage — 208 or 240V — to the 24V signal voltage that powers your thermostat, control board, contactors, and every other low-voltage component in the system. When this transformer fails, the entire control circuit goes dead: your thermostat goes blank, the system won't respond to calls for heating or cooling, and no fault codes will appear because there's no power to generate them.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 208\/240V primary input | 24V secondary output | 40VA power rating | 50\/60 Hz | OEM part #HT01BD209 | Factory-matched electrical tolerances\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances for your specific unit. Undersized or off-tolerance aftermarket units can sag under load, causing nuisance lockouts, erratic thermostat behavior, or premature contactor failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Always shut off power at the disconnect and breaker before touching any wiring. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Photograph all wire connections before disconnecting the old transformer.\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 as the direct OEM replacement for \u003cstrong\u003eCarrier model PY3PPA036090AA\u003c\/strong\u003e. Always verify input voltage and VA rating on your unit's data plate before ordering. Our parts specialists are available to confirm fitment — order with confidence and get your system back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640361931123,"sku":"CARRIE-PY3PPA036090AA-TRANSFORMER-HT01BD209","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640361963891,"sku":"CARRIE-PY3PPA036090AA-TRANSFORMER-HT01BD209-GEN","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-HT01BD209_850d7678-1318-4cb5-aa3c-6feadf1b565c.jpg?v=1782942431","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3ppa036090aa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}