{"product_id":"payne-pa3ppa036000ab-transformer-h30291","title":"OEM Payne Transformer 40VA 120V-24V for PA3PPA036000AB","description":"\u003ch1\u003eOEM Payne 40VA Control Transformer HT01BD209 for Model PA3PPA036000AB\u003c\/h1\u003e\u003cp\u003eThis is the factory-specified OEM replacement transformer (part number \u003cstrong\u003eHT01BD209\u003c\/strong\u003e) for the \u003cstrong\u003ePayne PA3PPA036000AB\u003c\/strong\u003e air conditioner. The transformer steps down 120V line voltage to the 24V signal required by your thermostat, contactor coil, and all low-voltage control components. When this part fails, the entire control circuit goes dead — your thermostat will appear unresponsive, the system will not call for cooling, and no diagnostic codes will display. If your system is completely unresponsive despite a working thermostat and confirmed power 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 rated | Primary: 120V | Secondary: 24V | OEM part number HT01BD209 | Factory-matched for Payne PA3PPA036000AB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine OEM transformer built to exact Payne factory specifications. Generic replacements may use undersized cores or inferior insulation that can overheat under continuous load, risking secondary control board damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Shut off all power before servicing. Tools needed: flat-head and Phillips screwdrivers, multimeter (to verify 24V output before reassembly), wire nuts or spade connectors. Photograph all wiring before disconnecting. Always check for a shorted secondary circuit that may have caused the original failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders placed before cutoff ship 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\u003ePA3PPA036000AB\u003c\/strong\u003e (3-ton split-system air conditioner). Verify your existing transformer's VA rating and primary\/secondary voltages on the unit's data plate before ordering. Our fitment team is available to confirm compatibility before you buy — same-day shipping ensures you're back up and running fast.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62908897198451,"sku":"PAYNE-PA3PPA036000AB-TRANSFORMER-HT01BD209","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62908897231219,"sku":"PAYNE-PA3PPA036000AB-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_19cbfb6f-db1e-4977-8d89-3266ce0f983d.jpg?v=1780718862","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa3ppa036000ab-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}