{"product_id":"payne-pa3gnaa30000aa-transformer-h30291","title":"OEM Payne Transformer 40VA 120V\/24V for PA3GNAA30000AA","description":"\u003ch1\u003eOEM Payne Transformer 40VA 120V to 24V for Model PA3GNAA30000AA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part # HT01BD209) for the \u003cstrong\u003ePayne PA3GNAA30000AA\u003c\/strong\u003e system. The transformer steps down 120V line voltage to 24V to power the entire low-voltage control circuit — including the thermostat, contactor coil, gas valve, and control board. When the transformer fails, nothing responds: the thermostat goes blank, the system won't call for heating or cooling, and you may measure zero volts on the secondary side. It is one of the first components to check when a system goes completely unresponsive.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V | Secondary: 24V | OEM part number HT01BD209 | Factory-matched for Payne PA3GNAA30000AA control circuit requirements\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit is wound to exact VA and voltage tolerances specified by Payne. Undersized or off-tolerance generic transformers can trip on overload repeatedly or deliver insufficient current to pull in a contactor coil, leading to nuisance lockouts and callbacks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power to the unit before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Label or photograph all wiring before disconnecting. Verify 0V at the primary terminals before touching any leads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as a direct OEM fit for the Payne PA3GNAA30000AA. Always verify your existing transformer's VA rating and primary\/secondary voltages on the unit's data plate or wiring diagram before ordering. Our parts specialists are available to confirm fitment — just reach out before you buy. \u003cstrong\u003eIn stock and ready to ship today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62908905980275,"sku":"PAYNE-PA3GNAA30000AA-TRANSFORMER-HT01BD209","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62908906013043,"sku":"PAYNE-PA3GNAA30000AA-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_d53051b3-e2c3-46a9-80e0-db1ca4a821ba.jpg?v=1780718959","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa3gnaa30000aa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}