{"product_id":"payne-pa3zna036000aa-transformer-h30291","title":"OEM Payne Transformer 40VA 120V\/24V for PA3ZNA036000AA","description":"\u003ch1\u003eOEM Payne Transformer 40VA 120V\/24V for Model PA3ZNA036000AA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD209\u003c\/strong\u003e) for the \u003cstrong\u003ePayne PA3ZNA036000AA\u003c\/strong\u003e split-system air conditioner. The transformer steps down 120V line voltage to 24V AC to power the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When the transformer fails, absolutely nothing responds: the thermostat goes blank, the system won't call for cooling or heating, and the contactor coil receives no signal. It is the single point of failure that can make an otherwise healthy system appear completely dead.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | Factory OEM part number HT01BD209 | Matched to Payne PA3ZNA036000AA control circuit requirements\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances for this model. Undersized or off-tolerance generic units can overheat, trip the internal breaker repeatedly, or fail prematurely — leaving you with the same no-power symptom within a season.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and verify zero voltage with a multimeter before proceeding. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or quick-connect terminals. Photograph all wiring connections before removing the old transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. In stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Fits Payne model \u003cstrong\u003ePA3ZNA036000AA\u003c\/strong\u003e (3-ton R-410A split-system condenser). Always verify your unit's data plate voltage and VA rating before ordering. If your system has a tripped transformer, inspect low-voltage wiring for shorts before installing the replacement — a wiring fault will immediately damage the new unit. Our parts specialists are available to confirm fitment before you order. \u003cstrong\u003eIn stock — order today and ships today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62908885631347,"sku":"PAYNE-PA3ZNA036000AA-TRANSFORMER-HT01BD209","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62908885664115,"sku":"PAYNE-PA3ZNA036000AA-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_c5359626-6990-4a7b-a37b-a70c5f9a82a6.jpg?v=1780718990","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa3zna036000aa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}