{"product_id":"carrier-c4850c50z2040500-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C50Z2040500 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD236 for Model C4850C50Z2040500\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 C4850C50Z2040500\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V signal voltage required by the thermostat, control board, contactor coil, and all low-voltage safety circuits. When this component fails, the entire control circuit goes dark — your thermostat will appear dead, the system will not respond to any calls for heating or cooling, and no error codes will display because the board itself has no power.\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 is a genuine Carrier OEM transformer wound to exact factory VA and voltage tolerances. Generic transformers often underperform under peak load, causing nuisance control board resets and premature contactor coil burnout due to voltage sag.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (verify 24V output after install). Photograph all low-voltage wiring connections before removing the old transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. Ships 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\u003eC4850C50Z2040500\u003c\/strong\u003e packaged unit. Always verify the transformer's VA rating and primary\/secondary voltages on your unit's wiring diagram before ordering. If your system has an upgraded control board drawing higher VA, confirm load requirements before installation. Our HVAC parts specialists are available to verify fitment — order with confidence and get it shipped today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909805166963,"sku":"CARRIE-C4850C50Z2040500-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909805199731,"sku":"CARRIE-C4850C50Z2040500-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_0bf4f510-7c58-48da-8af5-6a6a326f3fb3.jpg?v=1782938996","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50z2040500-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}