{"product_id":"carrier-upflow080u42m19a-transformer-h3hvc4","title":"OEM Carrier Furnace Transformer 40VA 120V\/24V — UPFLOW080U42M19A","description":"\u003ch1\u003eOEM Carrier Furnace Transformer 40VA 120V to 24V for Model UPFLOW080U42M19A\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part# \u003cstrong\u003eHT01CN001\u003c\/strong\u003e) is the factory-specified control circuit transformer for the \u003cstrong\u003eCarrier UPFLOW080U42M19A\u003c\/strong\u003e upflow gas furnace. The transformer steps down line voltage from \u003cstrong\u003e120V primary to 24V\/12V secondary\u003c\/strong\u003e at \u003cstrong\u003e40VA\u003c\/strong\u003e, powering the low-voltage control circuit that communicates between your thermostat, control board, gas valve, and all safety switches. When this transformer fails — due to electrical surges, short circuits in control wiring, or normal wear — the entire control circuit goes dark. Symptoms include a completely unresponsive thermostat, a furnace that won't activate on a call for heat, or faint buzzing\/humming from the transformer itself with no system response.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 120V primary | 24V\/12V secondary | 40VA rated | OEM part# HT01CN001 | Direct factory replacement for Carrier UPFLOW080U42M19A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is the genuine Carrier OEM transformer — factory-matched VA rating and winding tolerances. Undersized or off-spec generic transformers risk nuisance trips, control board damage, and premature failure under full furnace load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Shut off all power to the furnace before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output post-install). Label all low-voltage wires before disconnecting. Verify secondary output before closing the cabinet.\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 specifically for the Carrier \u003cstrong\u003eUPFLOW080U42M19A\u003c\/strong\u003e upflow gas furnace. Always verify the OEM part number on your unit's wiring diagram or data plate before ordering. Have a compatibility question? Our HVAC parts specialists confirm fitment before you buy — order with confidence.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640242721139,"sku":"CARRIE-UPFLOW080U42M19A-TRANSFORMER-HT01CN001","price":353.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640242753907,"sku":"CARRIE-UPFLOW080U42M19A-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_36e5dc60-bd27-4cc7-bf7b-5f04e6febaf7.jpg?v=1775031853","url":"https:\/\/nationalhvacparts.com\/products\/carrier-upflow080u42m19a-transformer-h3hvc4","provider":"National HVAC Parts","version":"1.0","type":"link"}