{"product_id":"carrier-py3gnaa48090aa-transformer-h30291","title":"OEM Carrier Transformer 40VA 120\/240V-24V for PY3GNAA48090AA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA for Model PY3GNAA48090AA\u003c\/h1\u003e\u003cp\u003eThis is the OEM factory-specified replacement transformer (part # \u003cstrong\u003eHT01BD209\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier PY3GNAA48090AA\u003c\/strong\u003e packaged unit. The transformer steps down line voltage (120V or 240V) to the 24V AC signal that powers the entire control circuit — including the thermostat, contactor coil, reversing valve, and control board. When this transformer fails, the system goes completely silent: no thermostat response, no staging, no fan — nothing works. It is often the first component to diagnose when a system shows zero 24V output at the control board.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120\/240V | Secondary: 24V AC | OEM part number HT01BD209 | Factory-matched windings and mounting footprint\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is the exact OEM unit built to Carrier's factory tolerances. Generic transformers may carry a wider VA variance, leading to undervoltage on the control circuit, nuisance lockouts, and premature contactor coil failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and verify zero voltage with a multimeter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Photograph all wiring connections before removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock and ships the 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\u003ePY3GNAA48090AA\u003c\/strong\u003e packaged unit. Always verify your unit's data plate voltage and VA requirements before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — contact us today and get your system back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640448078195,"sku":"CARRIE-PY3GNAA48090AA-TRANSFORMER-HT01BD209","price":35.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640448110963,"sku":"CARRIE-PY3GNAA48090AA-TRANSFORMER-HT01BD209-GEN","price":30.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BD209_beda97fb-0a38-4eb5-8d60-61ae6049aa93.jpg?v=1775041245","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3gnaa48090aa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}