{"product_id":"carrier-upflow100fau-14-transformer-fnyqxl","title":"OEM Carrier Transformer 50VA 120\/240-24V for UPFLOW100FAU%14","description":"\u003ch1\u003eOEM Carrier Control Transformer 50VA 120\/208\/240V–12\/24V for Model UPFLOW100FAU%14\u003c\/h1\u003e\u003cp\u003eThis OEM step-down transformer (part number \u003cstrong\u003eP201-35150\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier UPFLOW100FAU%14\u003c\/strong\u003e upflow furnace. The transformer steps incoming line voltage (120\/208\/240 VAC) down to a safe 12\/24 VAC to power the system's control board, thermostat, and all low-voltage circuit components. When the transformer fails, the entire control circuit loses power — symptoms include a completely unresponsive thermostat, a furnace that won't fire at all, or a tripped secondary fuse with no obvious cause elsewhere in the circuit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 50VA rating | Primary: 120\/208\/240 VAC multi-tap | Secondary: 12\/24 VAC | Single-phase | 60 Hz | CSA listed | Dimensions: 3.8″L × 3.1″W × 2.2″H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier\/Totaline factory-authorized part. OEM transformers are wound and potted to exact VA and impedance tolerances for the UPFLOW100FAU%14 control board. Off-brand units frequently run undersized VA ratings, causing nuisance fuse trips and premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Always disconnect power at the breaker and verify zero voltage before handling. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Photograph all low-voltage wiring connections before removal. Typical tech time: 20–35 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 Engineered for Carrier model \u003cstrong\u003eUPFLOW100FAU%14\u003c\/strong\u003e upflow gas furnaces. Cross-references: Totaline P201-35150, HCTY156D0LS11102. Verify your unit's data plate shows a matching primary voltage tap (120\/208\/240V) before ordering. Our parts team is available to confirm fitment — reach out before you buy if you're unsure.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640238788979,"sku":"CARRIE-UPFLOW100FAU%14-TRANSFORMER-P201-35150","price":56.7,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640238821747,"sku":"CARRIE-UPFLOW100FAU%14-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_1d772d6a-5a32-493d-8477-c3057eb63b21.jpg?v=1782942840","url":"https:\/\/nationalhvacparts.com\/products\/carrier-upflow100fau-14-transformer-fnyqxl","provider":"National HVAC Parts","version":"1.0","type":"link"}