{"product_id":"carrier-c4850c50z3105610-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V\/24V for C4850C50Z3105610 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V\/24V for Model C4850C50Z3105610\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C4850C50Z3105610\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V signal voltage required by your thermostat, control board, and all low-voltage safety and switching circuits. When the 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 no contactors or relays will energize. It is often one of the first components to check when a system shows absolutely no response despite confirmed line power at the unit.\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 for Carrier packaged unit control circuits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound to exact factory VA and voltage specifications. Undersized or off-tolerance generic transformers can overload under peak demand, blow internal fuses, or cause erratic low-voltage behavior — shortening control board life.\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 screwdriver, wire stripper, multimeter, needle-nose pliers. Always verify 0V at primary terminals before handling. Photo all wire connections before removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. In stock and ships 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 C4850C50Z3105610\u003c\/strong\u003e packaged unit. Confirm your existing transformer's VA rating and primary\/secondary voltages on the data plate or wiring diagram before ordering. Our fitment specialists are available to verify compatibility before you purchase — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909786947955,"sku":"CARRIE-C4850C50Z3105610-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909786980723,"sku":"CARRIE-C4850C50Z3105610-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_381c49e5-bf87-4214-ae01-0c427c857139.jpg?v=1782940139","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50z3105610-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}