{"product_id":"carrier-py3gna048090aa-transformer-h30291","title":"OEM Carrier Control Transformer 40VA 208\/230V–24V for PY3GNA048090AA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 208\/230V to 24V — Model PY3GNA048090AA\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM control transformer for the \u003cstrong\u003eCarrier PY3GNA048090AA\u003c\/strong\u003e packaged unit, carrying OEM part number \u003cstrong\u003eHT01BD209\u003c\/strong\u003e. The transformer steps down line voltage from 208\/230V to 24V to power the entire low-voltage control circuit — including the thermostat, contactor coil, gas valve, and control board. When the transformer fails, the result is total loss of control power: a completely unresponsive thermostat, a system that won't heat or cool, and no 24V signal anywhere in the circuit. It's one of the first components to check when nothing works at all.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 208\/230V primary | 24V secondary | 40VA rated | 50\/60Hz | Replaces HT01BD207, HT01CN232, and 9076-00\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to Carrier's exact VA and insulation class, preventing voltage sag under full control-circuit load. Generic units may underperform at rated VA, causing nuisance lockouts and premature failure of downstream components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the disconnect and verify 0V with a multimeter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade terminals. Photograph all existing wiring connections before removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Ships same business day from our warehouse — order before 3PM for same-day dispatch.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Directly fits \u003cstrong\u003eCarrier model PY3GNA048090AA\u003c\/strong\u003e. Also compatible with Bryant and Payne units sharing this transformer specification. Always verify your unit's data plate voltage and VA rating before ordering — our fitment team is available to confirm compatibility before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640475079027,"sku":"CARRIE-PY3GNA048090AA-TRANSFORMER-HT01BD209","price":50.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640475111795,"sku":"CARRIE-PY3GNA048090AA-TRANSFORMER-HT01BD209-GEN","price":44.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BD209_18c222b8-7c03-4891-abe2-6d239ffa47ee.jpg?v=1775025498","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3gna048090aa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}