{"product_id":"carrier-c48a306051-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C48A306051 — Ships Today","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA for Model C48A306051\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement control transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C48A306051\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 120V to the 24V required by your thermostat, contactor coil, and all low-voltage control circuits. When the transformer fails, the entire control system loses power — the thermostat goes blank, the unit won't respond to any calls for heating or cooling, and nothing works. It is often the first component to inspect when a system is completely unresponsive.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary input | 24V secondary output | OEM part number HT01BD236 | Factory-matched electrical specifications for reliable control circuit protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound and rated to Carrier's exact factory specifications, including proper VA sizing for the full low-voltage load of the C48A306051. Undersized or off-spec generic transformers can overheat, blow the secondary fuse repeatedly, or fail prematurely under full control circuit load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter, wire stripper. Always verify 24V output at secondary terminals after installation before restoring full system power. Note any inline 3A or 5A fuse on the secondary — replace if blown.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock units ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the \u003cstrong\u003eCarrier C48A306051\u003c\/strong\u003e packaged unit. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or wiring diagram before ordering to confirm fitment. Our HVAC parts specialists are available to verify compatibility before you purchase — same-day shipping on all in-stock orders.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909748380019,"sku":"CARRIE-C48A306051-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909748412787,"sku":"CARRIE-C48A306051-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_af4fef19-897c-4d72-a06e-c575a0e7a7b2.jpg?v=1782939177","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a306051-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}