{"product_id":"payne-pa3pna048000aa-transformer-h30291","title":"OEM Payne Transformer 40VA 120\/24V for PA3PNA048000AA","description":"\u003ch1\u003eOEM Payne 40VA Control Transformer for Model PA3PNA048000AA\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part# \u003cstrong\u003eHT01BD209\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003ePayne PA3PNA048000AA\u003c\/strong\u003e air conditioning system. The transformer steps down 120V line voltage to the 24V signal used by your thermostat, contactor coil, and control board. When the transformer fails, the entire control circuit goes dead — your thermostat goes blank, nothing responds to a call for cooling or heating, and the system will not operate at all. It is one of the first components to check during a no-power diagnostic.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V | Secondary: 24V | Factory-matched OEM tolerances | Replaces OEM part# HT01BD209\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine OEM Payne transformer wound to exact factory VA and voltage specifications. Generic replacements often use thinner wire gauges and lower-grade core laminations, leading to overheating and premature failure — especially under high-demand multi-zone control loads.\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, wire stripper, multimeter to confirm 24V output after installation. Label all wiring connections before disconnecting the old unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock units ship same business day from our warehouse when ordered before cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the \u003cstrong\u003ePayne PA3PNA048000AA\u003c\/strong\u003e 4-ton packaged or split-system unit. Always verify your existing transformer's VA rating and primary\/secondary voltages against the data plate inside your unit before ordering. Our parts team is available to confirm fitment — order with confidence and get back to comfort fast.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62908900311411,"sku":"PAYNE-PA3PNA048000AA-TRANSFORMER-HT01BD209","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62908900344179,"sku":"PAYNE-PA3PNA048000AA-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_6fd4e40d-3f6b-447e-bfc4-e833705207b0.jpg?v=1780718796","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa3pna048000aa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}