{"product_id":"carrier-upflow125cu12a-transformer-fnyqxl","title":"OEM Carrier Transformer 50VA 120\/240-24V for UPFLOW125CU12A","description":"\u003ch1\u003eOEM Carrier 50VA Control Transformer 120\/208\/240–24V for Model UPFLOW125CU12A\u003c\/h1\u003e\u003cp\u003eThis OEM step-down transformer is the factory-specified replacement for the \u003cstrong\u003eCarrier UPFLOW125CU12A\u003c\/strong\u003e upflow furnace. It converts incoming line voltage (120\/208\/240 VAC) to the 24 VAC needed to power the system's control board, thermostat circuit, and all low-voltage components. When this transformer fails, the entire control circuit loses power — resulting in a completely unresponsive furnace, a blower that won't start, or a system that trips the low-voltage fuse repeatedly. Replacing the transformer is one of the most cost-effective repairs in the furnace control circuit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 50 VA rating | Primary: 120\/208\/240 VAC multi-tap | Secondary: 12\/24 VAC | Single phase | 60 Hz | CSA listed | Factory part number P201-35150\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound and potted to exact Carrier tolerances, ensuring stable 24V output under load. Generic units often deliver inconsistent secondary voltage, causing nuisance lockouts, board resets, or premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter (to verify 24V output after install). Label and photograph all wiring connections before removal. Typical install time: 20–30 minutes.\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 Designed for the Carrier \u003cstrong\u003eUPFLOW125CU12A\u003c\/strong\u003e upflow gas furnace. Always verify the part number printed on your existing transformer before ordering to confirm the correct VA rating and voltage taps match your unit's wiring configuration. Our HVAC parts specialists are available to confirm fitment — reach out before you order if you have any questions.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640234266995,"sku":"CARRIE-UPFLOW125CU12A-TRANSFORMER-P201-35150","price":56.7,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640234299763,"sku":"CARRIE-UPFLOW125CU12A-TRANSFORMER-P201-35150-GEN","price":20.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-P201-35150_b43e16ed-1c21-47ad-a342-d7541bf78454.jpg?v=1782942863","url":"https:\/\/nationalhvacparts.com\/products\/carrier-upflow125cu12a-transformer-fnyqxl","provider":"National HVAC Parts","version":"1.0","type":"link"}