{"product_id":"carrier-c4850c50z2055600-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V Control Transformer for C4850C50Z2055600 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA for Model C4850C50Z2055600\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C4850C50Z2055600\u003c\/strong\u003e packaged unit. The transformer steps down line voltage (120V) to the 24V signal used by the control board, thermostat, and all low-voltage components. When it fails, the entire control circuit goes dark — the thermostat appears dead, no calls for heat or cool are recognized, and the system will not respond to any input. It is often the first component to check when nothing works.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Class 2 output | Factory-matched OEM replacement | Part# HT01BD236\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances required by Carrier's control board. Undersized or off-tolerance generic units can overload quickly, damage downstream boards, and void equipment warranties.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and confirm voltage is absent before handling. Tools needed: flathead and Phillips screwdrivers, wire nuts or quick-connects, multimeter to verify 24V output after install. Label all wires before disconnecting.\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\u003eC4850C50Z2055600\u003c\/strong\u003e packaged unit. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate before ordering. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you buy — reach out before placing your order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909802054003,"sku":"CARRIE-C4850C50Z2055600-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909802086771,"sku":"CARRIE-C4850C50Z2055600-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_a1230d73-b364-4502-9199-674d57e2684b.jpg?v=1782938791","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50z2055600-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}