{"product_id":"payne-pa3geaa42000aa-transformer-h2uxan","title":"OEM Payne Transformer 40VA 120V\/24V for PA3GEAA42000AA","description":"\u003ch1\u003eOEM Payne 40VA Control Transformer HT01BC701 for Model PA3GEAA42000AA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part# \u003cstrong\u003eHT01BC701\u003c\/strong\u003e) for the \u003cstrong\u003ePayne PA3GEAA42000AA\u003c\/strong\u003e air conditioner. The transformer steps down line voltage from 120V to 24V AC to power the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When this transformer fails, the result is total system unresponsiveness: a blank thermostat display, no response to temperature calls, and no operation whatsoever. It is often the first component to check when absolutely nothing works.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V AC | Secondary: 24V AC | Factory-matched OEM part number HT01BC701 | Designed for Payne residential split-system equipment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound and insulated to Payne's exact factory specifications, ensuring proper VA output under load. Generic transformers may be under-rated in practice, causing voltage sag that triggers nuisance lockouts or damages the control board over time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power to the unit before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Confirm 24V output at secondary terminals after installation before restoring the system to operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock units ship same business day when ordered before cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the \u003cstrong\u003ePayne PA3GEAA42000AA\u003c\/strong\u003e split-system air conditioner. Always verify your existing transformer's VA rating and primary\/secondary voltages against your unit's data plate before ordering. Our parts specialists are available to confirm fitment — reach out before you buy for total confidence.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62908908241267,"sku":"PAYNE-PA3GEAA42000AA-TRANSFORMER-HT01BC701","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62908908274035,"sku":"PAYNE-PA3GEAA42000AA-TRANSFORMER-HT01BC701-GEN","price":30.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BC701_27433768-7a49-41ab-a7a2-eef02815d31d.jpg?v=1780718946","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa3geaa42000aa-transformer-h2uxan","provider":"National HVAC Parts","version":"1.0","type":"link"}