{"product_id":"payne-pa3pna036000aa-transformer-h30291","title":"OEM Payne Transformer 40VA 120V-24V for PA3PNA036000AA","description":"\u003ch1\u003eOEM Payne 40VA Control Transformer for Model PA3PNA036000AA\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 PA3PNA036000AA\u003c\/strong\u003e split-system air conditioner. The transformer steps down 120V line voltage to the 24V signal voltage that powers your thermostat, contactor coil, and all low-voltage control circuits. When this component fails, the entire control system goes silent — the thermostat loses power, the contactor won't energize, and the system will not respond to any call for cooling or heating. If nothing happens when you adjust the thermostat, 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 | Primary: 120V | Secondary: 24V | OEM part number HT01BD209 | Factory-matched output tolerance for reliable low-voltage signal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer meets Payne's exact VA rating and insulation class. Undersized or off-spec generic transformers can overheat, trip their internal breaker repeatedly, or fail prematurely — especially when multiple zone valves or accessories load the secondary circuit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Shut off all power to the unit at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire stripper, wire nuts. Photograph or label all wiring connections before removal. Verify secondary output voltage after installation before closing the cabinet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders placed before our daily cutoff ship same business day from stock.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered for the Payne \u003cstrong\u003ePA3PNA036000AA\u003c\/strong\u003e (3-ton split-system condenser). Always verify the transformer's VA rating and primary\/secondary voltages against your unit's data plate and wiring diagram before installing. Our parts specialists are available to confirm fitment prior to your order — reach out before you buy if you have any questions.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62908901228915,"sku":"PAYNE-PA3PNA036000AA-TRANSFORMER-HT01BD209","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62908901261683,"sku":"PAYNE-PA3PNA036000AA-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_f21b02b5-c2e4-4869-a23e-599e803ebdd0.jpg?v=1780718853","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa3pna036000aa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}