{"product_id":"carrier-c4850c50z8105610-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V\/24V for C4850C50Z8105610","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V\/24V for Model C4850C50Z8105610\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C4850C50Z8105610\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 120V to the 24V AC required to power the control board, thermostat, and all low-voltage safety circuits throughout the system. When the transformer fails, the entire control circuit goes dead — your thermostat will appear unresponsive, no relays or contactors will energize, and the system will not attempt to start in any mode. Transformer failure is often caused by a short downstream in the 24V wiring or a failed component that draws excessive current, so always inspect the low-voltage circuit before replacing.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input: 120V AC | Output: 24V AC | Rating: 40VA | OEM Part Number: HT01BD236 | Designed for Carrier packaged unit application\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound and insulated to Carrier factory specifications, ensuring precise 24V output under load. Generic alternatives may produce unstable voltage that causes nuisance lockouts, erratic board behavior, or premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power at the breaker before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or terminal connectors. Verify 24V output with a multimeter after installation before restoring full system power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. 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 specifically for the Carrier \u003cstrong\u003eC4850C50Z8105610\u003c\/strong\u003e packaged unit. Confirm your existing transformer's input\/output voltage and VA rating on the unit's data plate before ordering to ensure proper fitment. Our parts specialists are available to verify compatibility before you purchase — reach out before you order and we'll confirm the fit.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909783998835,"sku":"CARRIE-C4850C50Z8105610-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909784031603,"sku":"CARRIE-C4850C50Z8105610-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_368e0357-7eca-4f8f-9556-79ebf8031024.jpg?v=1782940147","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50z8105610-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}