{"product_id":"carrier-py3gnaa60090na-transformer-h30291","title":"OEM Carrier Transformer 40VA 208\/240V–24V for PY3GNAA60090NA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 208\/240V–24V for Model PY3GNAA60090NA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier control transformer (part #HT01BD209) is the factory-specified replacement for the \u003cstrong\u003eCarrier PY3GNAA60090NA\u003c\/strong\u003e. The transformer steps down 208\/240V line voltage to the 24V signal used by your thermostat, control board, contactor coil, and every other low-voltage component in the system. When this part fails, the entire control circuit goes dark — nothing responds, including the thermostat, and the system will not run at all. If you have 240V at the disconnect but zero voltage at the 24V secondary terminals, this transformer is the most likely culprit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA capacity | 208\/240V primary input | 24V secondary output | 50\/60 Hz | Replaces HT01BD207, HT01CN232, and 9076-00\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound and rated to exact factory tolerances, protecting sensitive control boards from voltage spikes or brownouts. Generic units may under-deliver VA capacity under load, causing intermittent lockouts and premature board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or terminal connectors. Always verify 0V at primary terminals before touching wiring. Label all low-voltage wires before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Direct factory replacement for Carrier model \u003cstrong\u003ePY3GNAA60090NA\u003c\/strong\u003e. Verify your existing transformer's primary voltage (208\/240V) and VA rating (40VA) against your unit's data plate before ordering. Cross-references: HT01BD207, HT01CN232, 9076-00. Questions about fitment? Our HVAC parts specialists verify compatibility before every order — call or chat now.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640445260147,"sku":"CARRIE-PY3GNAA60090NA-TRANSFORMER-HT01BD209","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640445292915,"sku":"CARRIE-PY3GNAA60090NA-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_f48ad09e-f8f7-43fe-91fa-d147e962499a.jpg?v=1782942378","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3gnaa60090na-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}