{"product_id":"carrier-c4850c50aw03561-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C50AW03561 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V→24V for Model C4850C50AW03561\u003c\/h1\u003e\u003cp\u003eThis OEM control circuit transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C4850C50AW03561\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 120V to 24V to power the entire low-voltage control circuit — including the thermostat, contactor coil, gas valve, and control board. When this component fails, absolutely nothing responds: the thermostat goes dark, the system won't call for heating or cooling, and no error codes appear because the control board itself has lost power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Class 2 control transformer | OEM part number HT01BD236 | Factory-matched output stability\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers maintain tighter voltage regulation under varying load conditions. Undersized or off-tolerance generic transformers can cause nuisance lockouts, contactor chatter, and premature control board failure — costing far more than the price difference.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power to the unit at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Always verify 24V output with a multimeter after installation before restoring full power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Ships same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the Carrier \u003cstrong\u003eC4850C50AW03561\u003c\/strong\u003e packaged unit. Confirm your unit's data plate voltage requirements match 120V primary \/ 24V secondary 40VA before ordering. Our parts specialists are available to verify fitment — order with confidence and get back up and running today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909821059443,"sku":"CARRIE-C4850C50AW03561-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909821092211,"sku":"CARRIE-C4850C50AW03561-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_c78e0de9-e87c-457e-8e1f-94d72e217e56.jpg?v=1782938907","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50aw03561-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}