{"product_id":"carrier-c4850c50z9105610-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C50Z9105610 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model C4850C50Z9105610\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C4850C50Z9105610\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 120V to the 24V signal required by your thermostat, control board, contactor coil, and all low-voltage control circuits. When this component fails, the entire control system loses power — the thermostat goes blank, the unit won't respond to any calls for heating or cooling, and no other diagnostics will progress until the transformer is replaced.\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 output for full control circuit compatibility\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound and insulated to exact factory VA and voltage specifications. Undersized or off-tolerance generic transformers can fail prematurely under peak load, damage connected control boards, or cause erratic system behavior.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker before any work. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter, wire nuts. Verify 24V output with a multimeter after installation before restoring full power. Always label wires before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock units ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the Carrier \u003cstrong\u003eC4850C50Z9105610\u003c\/strong\u003e packaged unit. Verify your existing transformer's VA rating and primary\/secondary voltage on your unit's data plate before ordering. If your system still has no 24V control power after transformer replacement, inspect for a shorted low-voltage wire that may have caused the original failure. Our parts specialists are available to confirm fitment before you order — get the right part the first time and ship it today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909783081331,"sku":"CARRIE-C4850C50Z9105610-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909783114099,"sku":"CARRIE-C4850C50Z9105610-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_3f0480ce-eb81-4e77-a28e-4adddc8c2091.jpg?v=1782939042","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50z9105610-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}