{"product_id":"carrier-c4850c50z3060900-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C50Z3060900 — Ships Today","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model C4850C50Z3060900\u003c\/h1\u003e\u003cp\u003eThis OEM replacement control transformer (part# \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified unit for the \u003cstrong\u003eCarrier C4850C50Z3060900\u003c\/strong\u003e packaged rooftop system. The transformer steps down 120V line voltage to 24V AC, powering the entire low-voltage control circuit — including the thermostat, contactor coil, gas valve, and control board. When the transformer fails, the result is total system unresponsiveness: the thermostat goes blank, no heating or cooling calls are answered, and the unit sits completely dead despite line voltage being present at the unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | Class 2 transformer | Factory-matched output for full control circuit load\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers like this HT01BD236 are wound to Carrier's exact VA tolerance and insulation class. Undersized or off-brand units can sag under load, causing intermittent lockouts or premature failure of downstream control boards.\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 screwdrivers, needle-nose pliers, multimeter (to confirm 24V output post-install). Photograph or label all low-voltage wiring before disconnecting from the old transformer's secondary terminals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders ship same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as a direct OEM drop-in for the Carrier \u003cstrong\u003eC4850C50Z3060900\u003c\/strong\u003e packaged unit. Always verify your unit's control circuit voltage and VA requirements on the data plate before ordering. Our fitment team is available to confirm compatibility before you buy — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909788717427,"sku":"CARRIE-C4850C50Z3060900-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909788750195,"sku":"CARRIE-C4850C50Z3060900-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_fc32c588-f5ab-4d36-91f5-adf8abf849a2.jpg?v=1782939024","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50z3060900-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}