{"product_id":"payne-pa3znb048000aa-transformer-h30291","title":"OEM Payne Transformer 40VA 120V\/24V for PA3ZNB048000AA","description":"\u003ch1\u003eOEM Payne 40VA Control Transformer for Model PA3ZNB048000AA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD209\u003c\/strong\u003e) for the \u003cstrong\u003ePayne PA3ZNB048000AA\u003c\/strong\u003e air conditioner. The transformer steps down line voltage from 120V to the 24V AC signal that powers your thermostat, contactor coil, and all low-voltage control circuits. When this part fails, the entire control system goes dark — the thermostat goes blank, the system won't respond to any call for cooling or heating, and no safety circuits can operate. If your unit is completely unresponsive despite confirmed line voltage at the disconnect, a failed transformer is one of the first components to test.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input 120V AC | Output 24V AC | 40VA rating | OEM part number HT01BD209 | Factory-matched electrical tolerances for reliable low-voltage control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is the genuine OEM Payne transformer, built to exact factory specifications. Generic transformers may carry insufficient VA ratings, causing overheating, nuisance tripping of the internal fuse, and premature failure of downstream control boards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label and photograph all wiring connections before removal. Confirm 24V output with a multimeter after installation before restoring full system power.\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 Designed specifically for the Payne \u003cstrong\u003ePA3ZNB048000AA\u003c\/strong\u003e 4-ton split-system condenser. Always verify OEM part number HT01BD209 against your unit's data plate or existing transformer label before ordering. Our fitment team is available to confirm compatibility prior to purchase — order with confidence and get your system back online fast.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62908878324083,"sku":"PAYNE-PA3ZNB048000AA-TRANSFORMER-HT01BD209","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62908878356851,"sku":"PAYNE-PA3ZNB048000AA-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_929dfbf9-5792-4b2a-9294-9589ed606aba.jpg?v=1780719004","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa3znb048000aa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}