{"product_id":"carrier-upflow125u60m19a-transformer-h3hvc4","title":"OEM Carrier Transformer 40VA 120V\/24V for UPFLOW125U60M19A","description":"\u003ch1\u003eOEM Carrier Furnace Transformer 40VA 120V to 24V — HT01CN001 for Model UPFLOW125U60M19A\u003c\/h1\u003e\u003cp\u003eThe \u003cstrong\u003eCarrier HT01CN001\u003c\/strong\u003e is the factory-specified OEM control transformer for the \u003cstrong\u003eUPFLOW125U60M19A\u003c\/strong\u003e gas furnace. It steps down 120V line voltage to a safe 24V signal that powers your thermostat, control board, and all low-voltage control circuits. When this transformer fails, the entire control circuit loses power — the thermostat goes dark, the system won't respond to any commands, and you may detect a faint burning smell or audible buzz near the furnace cabinet. Replacing it with the correct OEM unit restores full system function immediately.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA capacity | 120V primary input | 12\/24V dual secondary output | Factory part number HT01CN001 | Replaces legacy part numbers HT01BJ115, 19EA41612, and 19EA42612\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM transformer wound to exact VA and voltage tolerance specifications. Generic aftermarket transformers often run outside the ±5% tolerance window, risking nuisance tripping of the control board's internal fuse or premature failure under high-demand heating cycles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the breaker and verify zero voltage with a multimeter before disconnecting wires. Label or photograph all 24V secondary wiring connections. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. The transformer mounts with two screws inside the blower compartment.\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 Directly fits Carrier model \u003cstrong\u003eUPFLOW125U60M19A\u003c\/strong\u003e gas furnace. Always verify your unit's data plate voltage requirements match 120V primary \/ 24V secondary before ordering. Need fitment confirmation? Our HVAC parts team verifies compatibility before you check out — order with confidence.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640232399219,"sku":"CARRIE-UPFLOW125U60M19A-TRANSFORMER-HT01CN001","price":353.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640232431987,"sku":"CARRIE-UPFLOW125U60M19A-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_2a6113f5-0f24-4f41-9182-c47de29e3281.jpg?v=1775041368","url":"https:\/\/nationalhvacparts.com\/products\/carrier-upflow125u60m19a-transformer-h3hvc4","provider":"National HVAC Parts","version":"1.0","type":"link"}