{"product_id":"payne-pa3pna042000ab-transformer-h30291","title":"OEM Payne Transformer 40VA 120V\/24V for PA3PNA042000AB","description":"\u003ch1\u003eOEM Payne Control Transformer 40VA for Model PA3PNA042000AB\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 PA3PNA042000AB\u003c\/strong\u003e air conditioner. The transformer steps down line voltage (120V) to the 24V signal required by your thermostat, contactor coil, and all low-voltage control circuits. When this component fails, the entire control circuit loses power — the thermostat goes blank, the system refuses to respond, and no heating or cooling can be initiated. If your Payne system is completely unresponsive despite having line voltage at the unit, 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 40VA rating | 120V primary \/ 24V secondary | OEM part number HT01BD209 | Factory-matched output voltage for reliable thermostat and contactor operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine OEM Payne transformer built to factory specifications. Generic aftermarket transformers may have inconsistent VA ratings or looser voltage tolerances, risking nuisance trips and premature failure of downstream control components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Shut off all power to the unit at the breaker and disconnect switch before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter, and wire nuts or terminal connectors. Always label existing low-voltage wiring before disconnecting. Verify 24V output with a multimeter before reassembling the cabinet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e Backed by a 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 This transformer is designed specifically for the \u003cstrong\u003ePayne PA3PNA042000AB\u003c\/strong\u003e split-system air conditioner. Confirm your unit's control circuit voltage requirements on the data plate before ordering. Our parts specialists are available to verify fitment — order with confidence and get your system back online fast.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62908900376947,"sku":"PAYNE-PA3PNA042000AB-TRANSFORMER-HT01BD209","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62908900409715,"sku":"PAYNE-PA3PNA042000AB-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_da4b2272-0440-4c97-b73d-c04874aaa06b.jpg?v=1780718974","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa3pna042000ab-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}