{"product_id":"carrier-c4850c50ak05161-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C50AK05161 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V–24V for Model C4850C50AK05161\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C4850C50AK05161\u003c\/strong\u003e packaged unit. The transformer is the heartbeat of your system's low-voltage control circuit — it steps 120V line voltage down to the 24V signal voltage that powers your thermostat, contactor coil, control board, and zone controls. When this transformer fails, absolutely nothing responds: the thermostat goes blank, the system won't call for heat or cooling, and no relays click. It's one of the first components to check when the entire control circuit goes silent.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Ring-style chassis mount | OEM part number HT01BD236 | Factory-matched output tolerance for reliable low-voltage signaling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit is wound and tested to Carrier's exact VA and voltage tolerances. Undersized or off-tolerance generic transformers can overheat, trip their internal breaker repeatedly, or fail to sustain voltage under full control-circuit load — leaving you chasing a misdiagnosis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter, wire nuts. Label all low-voltage wires before disconnecting the old unit. Confirm secondary output voltage with a multimeter before closing the panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Ships same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the \u003cstrong\u003eCarrier C4850C50AK05161\u003c\/strong\u003e packaged unit. Always verify the VA rating and primary\/secondary voltages on your unit's data plate before ordering — installing an undersized transformer can cause nuisance tripping and premature failure. Have questions about fitment? Our HVAC parts specialists verify compatibility before you buy. \u003cstrong\u003eOrder now and ship today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909826040179,"sku":"CARRIE-C4850C50AK05161-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909826072947,"sku":"CARRIE-C4850C50AK05161-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_9861b181-2f42-4c87-8daf-0244f1d5957e.jpg?v=1782938882","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50ak05161-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}