{"product_id":"carrier-upflow125fau14125-transformer-fnyqxl","title":"OEM Carrier 40VA Transformer P201-35150 for UPFLOW125FAU14125","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer P201-35150 for Model UPFLOW125FAU14125\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer is the factory-specified replacement for the \u003cstrong\u003eCarrier UPFLOW125FAU14125\u003c\/strong\u003e upflow gas furnace. The transformer steps down line voltage (120V) to the 24V AC signal that powers the control board, thermostat circuit, and all low-voltage safety controls. When it fails, the entire control circuit goes dark — symptoms include a completely unresponsive thermostat, no furnace activity whatsoever, or a tripped fuse on the control board caused by a secondary short.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Factory-matched to Carrier UPFLOW125FAU14125 control circuit | OEM part number P201-35150\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine OEM Carrier transformer engineered to exact VA, voltage, and mounting specifications. Generic transformers may be under-rated in VA output, leading to nuisance fuse trips and premature control board damage under high-demand switching loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (verify 24V output after install). Always note wire positions before disconnecting. Check and replace the 3A or 5A control board fuse if blown.\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 Direct OEM replacement for Carrier model \u003cstrong\u003eUPFLOW125FAU14125\u003c\/strong\u003e upflow furnaces. Always verify your unit's data plate voltage requirements before ordering. Not sure if this is the right part? Our HVAC parts specialists verify fitment before you buy — reach out before you order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640231776627,"sku":"CARRIE-UPFLOW125FAU14125-TRANSFORMER-P201-35150","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640231809395,"sku":"CARRIE-UPFLOW125FAU14125-TRANSFORMER-P201-35150-GEN","price":30.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-P201-35150_79593435-0d77-4141-89b0-d7a7a72a1464.jpg?v=1775016678","url":"https:\/\/nationalhvacparts.com\/products\/carrier-upflow125fau14125-transformer-fnyqxl","provider":"National HVAC Parts","version":"1.0","type":"link"}