{"product_id":"payne-pa3gpaa42000aa-transformer-h30291","title":"OEM Payne Transformer 40VA 120V-24V for PA3GPAA42000AA","description":"\u003ch1\u003eOEM Payne 40VA Control Transformer HT01BD209 for Model PA3GPAA42000AA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD209\u003c\/strong\u003e) for the \u003cstrong\u003ePayne PA3GPAA42000AA\u003c\/strong\u003e packaged air conditioner. The control transformer steps down 120V line voltage to the 24V low-voltage signal that powers your thermostat, contactor coil, and all control board logic. When this transformer fails, the entire control circuit goes dead — the thermostat goes blank, the system refuses to respond to any commands, and no heating or cooling stage will activate. It is often the first component to inspect when nothing works at all.\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 impedance and thermal protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is the exact factory OEM unit. Generic transformers frequently lack proper VA headroom, causing overheating and nuisance tripping when multiple control loads are active simultaneously — shortening the life of your control board and contactor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and breaker before proceeding. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade terminals. Verify 0V at primary terminals before touching wiring. Label all wires prior to removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders placed by cutoff ship the same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Payne \u003cstrong\u003ePA3GPAA42000AA\u003c\/strong\u003e packaged unit. Confirm your existing transformer's VA rating and primary\/secondary voltages on the data plate or original component label before ordering. Our fitment team is available to verify compatibility prior to purchase — same-day shipping ensures minimal system downtime.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62908904407411,"sku":"PAYNE-PA3GPAA42000AA-TRANSFORMER-HT01BD209","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62908904440179,"sku":"PAYNE-PA3GPAA42000AA-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_f0414cb3-8099-434c-b3fd-adb14956140d.jpg?v=1780718847","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa3gpaa42000aa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}