{"product_id":"carrier-c4850c50z3050200-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V\/24V for C4850C50Z3050200","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model C4850C50Z3050200\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C4850C50Z3050200\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 120V to 24V AC to power the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When this transformer fails, the system goes completely unresponsive: the thermostat goes blank, the unit won't energize, and nothing happens on a call for heating or cooling. It is often the first component to check when the entire control circuit is dead.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | OEM part number HT01BD236 | Factory-matched output for Carrier C4850C50Z3050200 control circuits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound to Carrier's exact VA and voltage specifications. Generic transformers often use thinner windings that overheat under sustained load, causing nuisance tripping or premature failure of downstream control components.\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 to verify 24V output after install. Always label wires before disconnecting the old unit.\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 Engineered for the Carrier \u003cstrong\u003eC4850C50Z3050200\u003c\/strong\u003e packaged unit. Verify the 40VA rating and 120V\/24V primary-to-secondary configuration on your unit's wiring diagram or data plate before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — contact us before placing your order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909795631475,"sku":"CARRIE-C4850C50Z3050200-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909795664243,"sku":"CARRIE-C4850C50Z3050200-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_195b965b-06d4-444a-95dc-c4543c25a839.jpg?v=1782940124","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50z3050200-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}