{"product_id":"carrier-c4850c50zz075610-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C50ZZ075610 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V–24V for Model C4850C50ZZ075610\u003c\/h1\u003e\u003cp\u003eThis OEM step-down transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C4850C50ZZ075610\u003c\/strong\u003e packaged unit. The transformer converts 120V line voltage down to the 24V AC signal that powers your thermostat, control board, contactor coil, and every low-voltage component in the system. When the transformer fails, nothing works — the thermostat goes blank, the unit does not respond to any call for heating or cooling, and no control functions are available. It is one of the most commonly overlooked failure points in any HVAC diagnosis.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | OEM part number HT01BD236 | Factory-matched output voltage and VA capacity for Carrier C4850C50ZZ075610\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is the genuine Carrier OEM transformer built to exact factory VA and voltage tolerances. Generic transformers frequently run under-rated VA, causing nuisance tripping, overheating, and premature control board failure under full low-voltage load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and breaker before proceeding. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter to confirm 24V output after installation. Label all low-voltage wires before disconnecting. Typical replacement time is 20–30 minutes for an experienced technician.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. 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 for the Carrier \u003cstrong\u003eC4850C50ZZ075610\u003c\/strong\u003e packaged unit. Verify your unit's data plate shows 120V primary control circuit and 24V secondary before ordering. If your system uses a 208\/240V primary transformer, do not substitute. Our parts specialists are available to confirm fitment before you order — same-day shipping on all stocked OEM components.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909765452147,"sku":"CARRIE-C4850C50ZZ075610-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909765484915,"sku":"CARRIE-C4850C50ZZ075610-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_d5e1e92f-529a-46a7-991b-0c5859ecd0d1.jpg?v=1782939099","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50zz075610-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}