{"product_id":"carrier-c4850c50zg050500-transformer-h302a1","title":"OEM Carrier 40VA 120V to 24V Control Transformer for C4850C50ZG050500 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V–24V for Model C4850C50ZG050500\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified control circuit transformer for the \u003cstrong\u003eCarrier C4850C50ZG050500\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to 24V AC to power the thermostat, control board, contactor coil, and all low-voltage switching circuits. When this transformer fails, the entire control circuit goes dark — the thermostat loses power, nothing calls for heat or cooling, and the system will not respond to any commands. A blown fuse on the secondary side is often the first clue; a failed transformer is the next suspect.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input 120V AC | Output 24V AC | 40VA rating | OEM part number HT01BD236 | Direct plug-and-play replacement for Carrier C4850C50ZG050500\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is the genuine factory OEM transformer, wound to exact VA and voltage tolerances. Generic transformers often run undersized VA ratings, causing overheating, nuisance fuse failures, and premature contactor coil burnout.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Label all wire connections before removing the old unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eC4850C50ZG050500\u003c\/strong\u003e packaged unit. Always verify your existing transformer's input voltage, output voltage, and VA rating on the data label before ordering. If you are unsure of fitment, our HVAC parts specialists are available to confirm compatibility before you purchase — same-day shipping guaranteed on in-stock OEM parts.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909780066675,"sku":"CARRIE-C4850C50ZG050500-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909780099443,"sku":"CARRIE-C4850C50ZG050500-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_e466603e-e11e-487a-bda4-ce972aa66a8a.jpg?v=1782899209","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50zg050500-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}