{"product_id":"payne-pa4gpxa48000aa-transformer-h30291","title":"OEM Payne Transformer 40VA 120V-24V for PA4GPXA48000AA","description":"\u003ch1\u003eOEM Payne Control Transformer 40VA for Model PA4GPXA48000AA\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM replacement transformer (part number \u003cstrong\u003eHT01BD209\u003c\/strong\u003e) for the \u003cstrong\u003ePayne PA4GPXA48000AA\u003c\/strong\u003e split-system air conditioner. The transformer steps down line voltage from 120V to 24V to power the low-voltage control circuit — including the thermostat, contactor coil, and control board. When it fails, the entire control circuit goes dead: your thermostat goes blank, the system won't respond to any call for cooling or heating, and nothing operates. It's one of the first components to check when your system shows absolutely no signs of life despite power being present at the unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | Ring-mount or bracket-mount configuration | Factory-matched output voltage tolerance for reliable control circuit operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM part HT01BD209 is wound and rated to exact Payne factory specifications. Generic transformers may carry lower VA ratings or looser voltage tolerances, risking nuisance tripping, control board damage, or repeated failures under normal system load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, wire stripper, and a multimeter to confirm 24V output after installation. Label or photograph all low-voltage wiring connections before disconnecting.\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\u003ePA4GPXA48000AA\u003c\/strong\u003e split-system condenser. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or existing component label before ordering. Our parts specialists are available to confirm fitment prior to purchase — order with confidence and get your system back online fast.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62908860465523,"sku":"PAYNE-PA4GPXA48000AA-TRANSFORMER-HT01BD209","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62908860498291,"sku":"PAYNE-PA4GPXA48000AA-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_0868a404-d919-4eb3-b4bf-fd1bc02818f8.jpg?v=1780718895","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa4gpxa48000aa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}