{"product_id":"payne-pa1pnb018000aaaa-transformer-h30291","title":"OEM Payne Transformer 40VA 120V-24V for PA1PNB018000AAAA","description":"\u003ch1\u003eOEM Payne Transformer 40VA 120V to 24V for Model PA1PNB018000AAAA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD209\u003c\/strong\u003e) for the \u003cstrong\u003ePayne PA1PNB018000AAAA\u003c\/strong\u003e air handler. The transformer steps down 120V line voltage to the 24V AC signal that powers the entire control circuit — including the thermostat, control board, and all low-voltage components. When this transformer fails, nothing in the system responds: the thermostat goes blank, relays won't energize, and the unit will not start in any mode. If you're measuring 0V at the R and C terminals on your control board with line voltage confirmed present, this transformer is the likely culprit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | Class 2 output | OEM part number HT01BD209 | Factory-matched for Payne PA1PNB018000AAAA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer meets Payne's exact VA rating and insulation class requirements. Undersized or off-spec generic transformers can overheat, trip internal thermal cutoffs, and damage the control board — OEM ensures full compatibility and safe operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power to the unit before starting. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter, wire nuts. Label or photograph all wiring connections before removal. Transformer mounts to the cabinet with a single screw in most configurations.\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 Designed specifically for the Payne \u003cstrong\u003ePA1PNB018000AAAA\u003c\/strong\u003e air handler. Always verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or wiring diagram before ordering. Our parts specialists are available to confirm fitment prior to purchase — order with confidence and get your system back online fast.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62908977578355,"sku":"PAYNE-PA1PNB018000AAAA-TRANSFORMER-HT01BD209","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62908977611123,"sku":"PAYNE-PA1PNB018000AAAA-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_a0c5ab2c-e3df-4233-9f5f-3fa7b4d8c3f7.jpg?v=1780718814","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa1pnb018000aaaa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}