{"product_id":"carrier-c4850c50z3055600-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V\/24V for C4850C50Z3055600","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model C4850C50Z3055600\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part# \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C4850C50Z3055600\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V signal used by your thermostat, contactor coil, and control board. When it fails, the entire low-voltage control circuit goes dead — the thermostat goes blank, the system won't respond to any call for heating or cooling, and no components stage on. It is often the first part to check when a system appears completely unresponsive despite confirmed line voltage at the unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V | Secondary: 24V | OEM part number HT01BD236 | Factory-matched for Carrier C4850C50Z3055600 packaged units\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound and insulated to Carrier's exact VA and thermal specs. Generic units may be under-rated in VA capacity, leading to nuisance trips or premature failure when multiple 24V loads are active simultaneously.\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, multimeter, wire nuts or spade connectors. Verify 24V output with a multimeter before reconnecting the control circuit. Always label or photograph existing wiring 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 for the Carrier \u003cstrong\u003eC4850C50Z3055600\u003c\/strong\u003e packaged unit. Confirm primary voltage and VA rating on your unit's data plate before ordering. If your system has multiple 24V accessories such as zone boards or humidifiers, verify total VA load does not exceed 40VA. Need help confirming fitment? Our HVAC parts team is standing by — order with confidence and get your system back online today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909794517363,"sku":"CARRIE-C4850C50Z3055600-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909794550131,"sku":"CARRIE-C4850C50Z3055600-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_a1199ac8-79ef-4a1b-98e9-abb501e66f0f.jpg?v=1782940134","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50z3055600-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}