{"product_id":"payne-pa3gnaa48000aa-transformer-h30291","title":"OEM Payne Transformer 40VA 120V\/24V for PA3GNAA48000AA","description":"\u003ch1\u003eOEM Payne Control Transformer 40VA for Model PA3GNAA48000AA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01BD209\u003c\/strong\u003e) is the factory-specified control transformer for the \u003cstrong\u003ePayne PA3GNAA48000AA\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V signal needed to power your thermostat, control board, contactor coil, and all low-voltage safety circuits. When it fails, nothing in the system responds — no heat, no cooling, no fan — because the entire control circuit loses power. A failed transformer is often identified by a dead thermostat display or a blown 3A control fuse immediately downstream.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | OEM part number HT01BD209 | Factory-matched output for stable, noise-free control voltage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances required by Payne's control board. Undersized or off-tolerance generic units can cause nuisance lockouts, erratic thermostat behavior, and premature control 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: flat-head and Phillips screwdrivers, multimeter, wire nuts or terminal connectors. Verify 0V at primary leads before touching wiring. Photograph all connections prior to removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Payne \u003cstrong\u003ePA3GNAA48000AA\u003c\/strong\u003e 4-ton packaged unit. Confirm your unit's control transformer specs on the data plate inside the access panel before ordering — primary voltage, secondary voltage, and VA rating must match. Our parts specialists are available to verify fitment before you buy. In stock and ready to ship today.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62908905030003,"sku":"PAYNE-PA3GNAA48000AA-TRANSFORMER-HT01BD209","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62908905062771,"sku":"PAYNE-PA3GNAA48000AA-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_a79a06f7-1e59-4975-8dfb-ad0a09f3da6a.jpg?v=1780718962","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa3gnaa48000aa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}