{"product_id":"payne-pa1pjb048000abaa-transformer-h30291","title":"OEM Payne Transformer 40VA 120\/24V HT01BD209 — PA1PJB048000ABAA","description":"\u003ch1\u003eOEM Payne 40VA Control Transformer HT01BD209 for Model PA1PJB048000ABAA\u003c\/h1\u003e\u003cp\u003eThis OEM step-down transformer is the factory-specified replacement for the \u003cstrong\u003ePayne PA1PJB048000ABAA\u003c\/strong\u003e packaged air conditioning unit. The transformer converts 120V line voltage to 24V to power the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When this component fails, \u003cstrong\u003enothing in the system responds\u003c\/strong\u003e: the thermostat goes blank, the unit will not energize, and no call for cooling or heating will be processed. A failed transformer is often misdiagnosed as a thermostat or control board issue, making this an essential first diagnostic replacement.\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 output voltage for stable control circuit operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound to Payne's exact VA and voltage tolerances. Generic transformers frequently deliver unstable 24V output, causing nuisance lockouts, contactor chatter, and premature control board failure — spending a few extra dollars on OEM here protects far more expensive downstream components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter (verify 0V before touching wiring). Label or photograph all low-voltage wire connections before removal. Replacement typically takes 20–30 minutes.\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 stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed and factory-matched for the \u003cstrong\u003ePayne PA1PJB048000ABAA\u003c\/strong\u003e 4-ton packaged air conditioning unit. 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 — reach out before you order if you have any questions.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62908981543283,"sku":"PAYNE-PA1PJB048000ABAA-TRANSFORMER-HT01BD209","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62908981576051,"sku":"PAYNE-PA1PJB048000ABAA-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_ff0c4d23-4c0e-4f95-bf24-a94922e1cb7a.jpg?v=1780718803","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa1pjb048000abaa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}