{"product_id":"carrier-upflow100fauhac14b-transformer-h3hvc4","title":"OEM Carrier 40VA Transformer HT01CN001 for UPFLOW100FAUHAC14B","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01CN001 for Model UPFLOW100FAUHAC14B\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer is the factory-specified replacement for the \u003cstrong\u003eCarrier UPFLOW100FAUHAC14B\u003c\/strong\u003e upflow gas furnace. The transformer steps down 120V line voltage to the 24V signal required by the thermostat, control board, gas valve, and all low-voltage safety circuits. When this component fails, the entire control circuit goes dark — symptoms include a completely unresponsive thermostat, a blank or locked-out furnace control board, or a system that shows power at the unit but will not respond to any call for heat or cooling.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Primary voltage: 120V | Secondary voltage: 24V | VA rating: 40VA | OEM part number: HT01CN001 | Factory-matched for Carrier UPFLOW100FAUHAC14B upflow furnaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact factory VA tolerances, ensuring stable 24V output under full load (contactor coil + gas valve + board simultaneously). Generic units may sag under load, causing nuisance lockouts or premature 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, needle-nose pliers, multimeter (to verify 24V output after install). Label or photograph all low-voltage wiring before disconnecting.\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\u003eUPFLOW100FAUHAC14B\u003c\/strong\u003e upflow gas furnace. Verify your unit's data plate confirms 120V primary \/ 24V secondary \/ 40VA rating before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you order — just reach out before purchasing.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640237117811,"sku":"CARRIE-UPFLOW100FAUHAC14B-TRANSFORMER-HT01CN001","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640237150579,"sku":"CARRIE-UPFLOW100FAUHAC14B-TRANSFORMER-HT01CN001-GEN","price":30.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01CN001_f3cf99ca-4556-4919-a233-2f03d8a42013.jpg?v=1775016645","url":"https:\/\/nationalhvacparts.com\/products\/carrier-upflow100fauhac14b-transformer-h3hvc4","provider":"National HVAC Parts","version":"1.0","type":"link"}