{"product_id":"carrier-c4850c50ay03651-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C50AY03651 — Ships Today","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA for Model C4850C50AY03651\u003c\/h1\u003e\u003cp\u003eThis is the OEM factory-specified control transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C4850C50AY03651\u003c\/strong\u003e packaged unit. The transformer steps down line voltage (120V) to the 24V signal required by the control board, thermostat, contactor coil, and all low-voltage components. When this transformer fails, the entire control circuit goes dead — the thermostat goes blank, the system won't respond to any call for heating or cooling, and you may find a blown fuse on the control board. It is one of the first components to check when nothing works at all.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V | Secondary: 24V | OEM part number HT01BD236 | Factory-matched for Carrier C4850C50AY03651 packaged units\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and impedance specifications, protecting downstream control boards and contactors from voltage sag. Generic units often run under-rated VA, causing nuisance tripping, blown fuses, and premature board failures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before proceeding. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (verify 24V output after install). Label or photograph all wiring connections before removing the old transformer.\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\u003eC4850C50AY03651\u003c\/strong\u003e packaged unit. Verify your existing transformer's primary\/secondary voltage and VA rating on the unit's data plate or wiring diagram before ordering. Our fitment team is available to confirm compatibility prior to purchase — same-day shipping on all in-stock OEM parts.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909811032435,"sku":"CARRIE-C4850C50AY03651-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909811065203,"sku":"CARRIE-C4850C50AY03651-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_9a0c6de2-7b4e-4b26-aca6-43bf6b2ddcaa.jpg?v=1782938960","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50ay03651-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}