{"product_id":"carrier-py3gna042060ab-transformer-h30291","title":"OEM Carrier Transformer 40VA 208\/240V–24V for PY3GNA042060AB","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 208\/240V–24V (HT01BD209) for Model PY3GNA042060AB\u003c\/h1\u003e\u003cp\u003eThis is the factory-specified OEM control transformer for the \u003cstrong\u003eCarrier PY3GNA042060AB\u003c\/strong\u003e packaged unit. The transformer steps down line voltage (208\/240V) to the 24V signal that powers your thermostat, control board, and every relay in the system. When it fails, the entire control circuit goes dead — the thermostat goes blank, nothing responds, and the unit won't start at all. A failed transformer is often misdiagnosed as a blown control board, making correct identification of this part critical before replacing more expensive components.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input 208\/240V | Output 24V | 40VA power rating | 50\/60Hz | OEM part number HT01BD209 | Factory-matched dimensions and wiring terminals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA tolerances, protecting downstream components from voltage sag under full control-circuit load. Generic units often run underrated, leading to premature failure of contactors and control boards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the breaker and verify with a multimeter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, multimeter, needle-nose pliers. Label all wires before disconnecting, and confirm 24V output after installation before closing the unit.\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 Engineered as the direct OEM replacement for \u003cstrong\u003eCarrier model PY3GNA042060AB\u003c\/strong\u003e. Verify your unit's data plate shows a 208\/240V primary and 24V secondary control circuit before ordering. Not sure about fitment? Our HVAC parts specialists verify compatibility before you buy — order with confidence or contact us today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640478912883,"sku":"CARRIE-PY3GNA042060AB-TRANSFORMER-HT01BD209","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640478945651,"sku":"CARRIE-PY3GNA042060AB-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_73fa018e-4aca-41df-bc73-6eac5eb7ad23.jpg?v=1782942345","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3gna042060ab-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}