{"product_id":"payne-pa3pna042000aa-transformer-h30291","title":"OEM Payne Transformer 40VA 120V\/24V for PA3PNA042000AA — HT01BD209","description":"\u003ch1\u003eOEM Payne 40VA Control Transformer for Model PA3PNA042000AA — Part HT01BD209\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD209\u003c\/strong\u003e) for the \u003cstrong\u003ePayne PA3PNA042000AA\u003c\/strong\u003e air conditioner. The transformer steps down line voltage (120V) to the 24V signal required by your thermostat, contactor coil, and control board. When this component fails, the entire control circuit goes dead — your thermostat will appear blank or unresponsive, and neither heating nor cooling will initiate regardless of settings. It is often the first component to check when a system shows absolutely zero response to thermostat input.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Class 2 transformer | Direct OEM replacement — factory-matched to Payne PA3PNA042000AA electrical specifications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit is wound to exact VA and voltage tolerances required by Payne. Undersized or off-tolerance generic transformers can overheat, trip their internal fuse, or deliver insufficient voltage to reliably pull in the contactor coil — shortening system life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker before starting. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter to verify 24V output after install. Label or photograph existing wiring before removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock units ship 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 PA3PNA042000AA\u003c\/strong\u003e split-system air conditioner. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate before ordering. Our parts specialists are available to confirm fitment — order with confidence and get your system back online fast.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62908900704627,"sku":"PAYNE-PA3PNA042000AA-TRANSFORMER-HT01BD209","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62908900737395,"sku":"PAYNE-PA3PNA042000AA-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_879fa49b-a027-4812-b4b5-7951f88a7be5.jpg?v=1780718973","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa3pna042000aa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}