{"product_id":"payne-pa3zpa049000aa-transformer-h30291","title":"OEM Payne Transformer 40VA 120V-24V for PA3ZPA049000AA","description":"\u003ch1\u003eOEM Payne 40VA Control Transformer for Model PA3ZPA049000AA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD209\u003c\/strong\u003e) for the \u003cstrong\u003ePayne PA3ZPA049000AA\u003c\/strong\u003e packaged air conditioning unit. The transformer steps down 120V line voltage to the 24V signal required by your thermostat, contactor coil, and control board. When this component fails, the entire control circuit goes dark — the thermostat becomes unresponsive, and the system will not heat, cool, or respond to any inputs. It is often the first component to inspect when a system appears completely dead with no fault codes or blown fuses.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120VAC | Secondary: 24VAC | OEM part number HT01BD209 | Factory-matched to Payne PA3ZPA049000AA control circuit requirements\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit is wound to exact VA and voltage tolerance specifications. Undersized or off-tolerance generic transformers overheat under load, blow fuses repeatedly, and can damage downstream control boards — making OEM the clear long-term value.\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 24VAC output at secondary terminals before restoring system power. Photograph all wiring connections before removal.\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 Engineered specifically for the \u003cstrong\u003ePayne PA3ZPA049000AA\u003c\/strong\u003e packaged unit. Confirm your unit's control voltage and VA requirement on the data plate before ordering. Our HVAC parts specialists are available to verify fitment — order with confidence and get your system back online fast.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62908867805555,"sku":"PAYNE-PA3ZPA049000AA-TRANSFORMER-HT01BD209","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62908867838323,"sku":"PAYNE-PA3ZPA049000AA-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_b04a69a8-a6af-446c-871a-4779f8b4da18.jpg?v=1780718886","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa3zpa049000aa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}