{"product_id":"carrier-upflow100fauhc12b-transformer-h3hvc4","title":"OEM Carrier Transformer 120V–24V 40VA for UPFLOW100FAUHC12B","description":"\u003ch1\u003eOEM Carrier Furnace Transformer 120V to 24V 40VA — HT01CN001 for Model UPFLOW100FAUHC12B\u003c\/h1\u003e\u003cp\u003eThe Carrier \u003cstrong\u003eHT01CN001\u003c\/strong\u003e is the factory OEM control transformer for the \u003cstrong\u003eUPFLOW100FAUHC12B\u003c\/strong\u003e upflow furnace. Its job is to step down 120V line voltage to a safe 24V (with a 12V tap) that powers every low-voltage component in the system — your thermostat, gas valve coil, inducer relay, and control board. When this transformer fails, the entire control circuit goes dark: the thermostat display goes blank, the system refuses to fire, and you may detect a faint buzzing or burning smell near the furnace cabinet. Replacing it with the correct OEM unit restores the factory-spec voltage your control board was designed to receive.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 120V primary | 24V \/ 12V secondary | 40VA rated | Factory Authorized Part — Cross-references HT01BJ115, 19EA41612, 19EA42612, HT01CN001A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01CN001 is wound and potted to Carrier's exact VA and impedance tolerances. Off-brand transformers rated at nominally similar specs frequently deliver marginal secondary voltages, causing nuisance lockouts, contactor chatter, and premature control board failures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off the furnace disconnect and verify zero voltage at the primary terminals before proceeding. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (verify 24V output after installation). Photograph all wiring before disconnecting. Direct plug-and-play replacement — no splicing required on most applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year Carrier 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 as the direct OEM replacement for the Carrier \u003cstrong\u003eUPFLOW100FAUHC12B\u003c\/strong\u003e upflow gas furnace. Always verify your unit's data plate voltage and VA requirements before ordering. Our fitment team is available to confirm compatibility before you buy — reach out before placing your order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640237314419,"sku":"CARRIE-UPFLOW100FAUHC12B-TRANSFORMER-HT01CN001","price":353.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640237347187,"sku":"CARRIE-UPFLOW100FAUHC12B-TRANSFORMER-HT01CN001-GEN","price":311.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01CN001_b7bde535-10c4-42f1-b588-21cf2bda09fa.jpg?v=1775041100","url":"https:\/\/nationalhvacparts.com\/products\/carrier-upflow100fauhc12b-transformer-h3hvc4","provider":"National HVAC Parts","version":"1.0","type":"link"}