{"product_id":"payne-pa3zna048000aa-transformer-h3025m","title":"OEM Payne Transformer 40VA 120V\/24V for PA3ZNA048000AA","description":"\u003ch1\u003eOEM Payne 40VA Control Transformer for Model PA3ZNA048000AA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part# \u003cstrong\u003eHT01BD242\u003c\/strong\u003e) is the factory-specified control circuit transformer for the \u003cstrong\u003ePayne PA3ZNA048000AA\u003c\/strong\u003e 4-ton packaged unit. The transformer steps down 120V line voltage to the 24V signal voltage that powers your thermostat, contactor coil, gas valve, and control board. When the transformer fails — due to a short in the control circuit, age, or a blown internal fuse — absolutely nothing works: no heating, no cooling, no thermostat display, and no response from any component. It is often the first part to check when a system goes completely silent.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | Factory-matched OEM design | Part number HT01BD242 | Replaces worn or shorted control transformers\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 specified by Payne engineering. Generic transformers frequently run undersized VA ratings, causing overheating and premature failure — especially when multiple 24V devices draw simultaneously.\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 nuts or push connectors, multimeter for output voltage verification. Label all low-voltage wires before disconnecting. Confirm 24V output with a meter before buttoning up the panel.\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 for the Payne \u003cstrong\u003ePA3ZNA048000AA\u003c\/strong\u003e 4-ton packaged unit. 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":62908885107059,"sku":"PAYNE-PA3ZNA048000AA-TRANSFORMER-HT01BD242","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62908885139827,"sku":"PAYNE-PA3ZNA048000AA-TRANSFORMER-HT01BD242-GEN","price":30.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BD242_9ea861f2-7bad-40b0-8cf9-0f7d189c1356.jpg?v=1780718992","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa3zna048000aa-transformer-h3025m","provider":"National HVAC Parts","version":"1.0","type":"link"}