{"product_id":"carrier-c48a403552-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C48A403552 — Ships Today","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model C48A403552\u003c\/h1\u003e\u003cp\u003eThis OEM replacement control transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified unit for the \u003cstrong\u003eCarrier C48A403552\u003c\/strong\u003e packaged system. The transformer steps down line voltage from 120V to the 24V signal voltage required to power the control board, thermostat, contactor coil, and all low-voltage safety circuits. When this component fails, the entire control circuit goes dead — the thermostat goes blank, the system will not respond to any calls for heating or cooling, and no low-voltage components will function.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Primary voltage: 120V AC | Secondary voltage: 24V AC | VA rating: 40VA | OEM part number: HT01BD236 | Factory-matched output tolerance for stable control circuit operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound to Carrier's exact VA and voltage specifications, ensuring reliable 24V output under full control circuit load. Generic units often underperform at rated VA, causing nuisance tripping of internal thermal protection and intermittent control failures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter to verify 24V output post-install. Label or photograph all low-voltage wiring connections before removing the old transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. Orders ship same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the Carrier \u003cstrong\u003eC48A403552\u003c\/strong\u003e packaged unit. Always verify your existing transformer's primary\/secondary voltage and VA rating from the unit data plate or wiring diagram before ordering. Our HVAC parts specialists are available to confirm fitment — order with confidence and get back to comfort fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909743202675,"sku":"CARRIE-C48A403552-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909743235443,"sku":"CARRIE-C48A403552-TRANSFORMER-HT01BD236-GEN","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-HT01BD236_b6e4af2d-bfff-4a76-b75f-d39cb8ae0e05.jpg?v=1782939217","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a403552-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}