{"product_id":"payne-pa3ppa030000aa-transformer-h30291","title":"OEM Payne Transformer 40VA 120V-24V for PA3PPA030000AA","description":"\u003ch1\u003eOEM Payne Transformer 40VA 120V to 24V for Model PA3PPA030000AA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD209\u003c\/strong\u003e) for the \u003cstrong\u003ePayne PA3PPA030000AA\u003c\/strong\u003e air conditioning system. The transformer is the heartbeat of your unit's control circuit — it steps down line voltage from 120V to the 24V signal voltage that powers your thermostat, contactor coil, and control board. When this transformer fails, absolutely nothing in the control circuit responds: the thermostat goes blank, the system won't call for cooling or heating, and there are no error codes because the board itself has no power. If you've already checked your fuses and breakers and still have no control voltage, this transformer is almost always the culprit.\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 for Payne PA3PPA030000AA control circuit requirements\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound to exact factory VA and voltage specifications. Generic units often run outside tolerance, causing nuisance tripping of the control fuse or insufficient voltage to reliably pull in the contactor coil.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Label or photograph all wiring connections before removing the old unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the Payne \u003cstrong\u003ePA3PPA030000AA\u003c\/strong\u003e split-system unit. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate before ordering to ensure a correct fit. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62908898247027,"sku":"PAYNE-PA3PPA030000AA-TRANSFORMER-HT01BD209","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62908898279795,"sku":"PAYNE-PA3PPA030000AA-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_1e7f2d10-208a-4f5f-b490-98446d6ed305.jpg?v=1780718859","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa3ppa030000aa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}