{"product_id":"carrier-c4850c48zg060500-transformer-h302a1","title":"OEM Carrier 40VA 120V to 24V Transformer for C4850C48ZG060500 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD236 for Model C4850C48ZG060500\u003c\/h1\u003e\u003cp\u003eThis OEM replacement control transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified unit for the \u003cstrong\u003eCarrier C4850C48ZG060500\u003c\/strong\u003e packaged system. The transformer steps down 120V line voltage to the 24V signal used by the thermostat, contactor coils, control board, and all low-voltage safety circuits. When this transformer fails, the entire control circuit goes dead — the thermostat displays nothing, the system won't respond to calls for heating or cooling, and no safety faults can be communicated. A failed transformer is often misdiagnosed as a bad thermostat or control board, making it one of the first components to verify during a no-power diagnostic.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01BD236 | Factory-matched impedance and thermal protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound to exact Carrier factory specifications with built-in thermal cutoff protection. Generic transformers frequently lack proper VA ratings or thermal fusing, risking downstream control board damage under surge or short-circuit conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power to the unit before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or terminal connectors. Label all low-voltage wiring before disconnecting. Confirm 24V output at secondary terminals 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 for the Carrier \u003cstrong\u003eC4850C48ZG060500\u003c\/strong\u003e packaged unit. Always verify your existing transformer's VA rating and primary\/secondary voltages against your unit's wiring diagram before ordering. Our technical team is available to confirm fitment prior to purchase — same-day shipping on all in-stock orders.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909862904179,"sku":"CARRIE-C4850C48ZG060500-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909862936947,"sku":"CARRIE-C4850C48ZG060500-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_49febecf-72e4-4ec3-862d-8db4b71c3c63.jpg?v=1782899385","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c48zg060500-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}