{"product_id":"payne-pa4gnxa30000aa-transformer-h30291","title":"OEM Payne Transformer 40VA 120V\/24V for PA4GNXA30000AA","description":"\u003ch1\u003eOEM Payne 40VA Control Transformer for Model PA4GNXA30000AA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part# \u003cstrong\u003eHT01BD209\u003c\/strong\u003e) is the factory-specified control transformer for the \u003cstrong\u003ePayne PA4GNXA30000AA\u003c\/strong\u003e air conditioner. The transformer steps down 120V line voltage to the 24V signal required by your 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 calls for cooling or heating, and no components energize. If you're getting 120V at the unit but zero response downstream, 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 for stable low-voltage control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine OEM Payne transformer built to exact VA and voltage tolerances. Generic transformers rated at borderline 40VA can sag under full control-circuit load, causing intermittent lockouts, nuisance tripping, and premature control board failure.\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 spade terminals. Label all wires before disconnecting the old transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Payne \u003cstrong\u003ePA4GNXA30000AA\u003c\/strong\u003e split-system air conditioner. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate before ordering. Our parts specialists are available to confirm fitment — contact us before you order if you have any questions. In stock and ready to ship today.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62908862464371,"sku":"PAYNE-PA4GNXA30000AA-TRANSFORMER-HT01BD209","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62908862497139,"sku":"PAYNE-PA4GNXA30000AA-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_1b188805-8f14-42b8-a6eb-66dadd6064ad.jpg?v=1780719020","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa4gnxa30000aa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}