{"product_id":"carrier-c4850c50z2060900-transformer-h302a1","title":"OEM Carrier 40VA 120V to 24V Control Transformer for C4850C50Z2060900 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V\/24V for Model C4850C50Z2060900\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 C4850C50Z2060900\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 120V to 24V AC, powering the entire low-voltage control circuit — including the thermostat, contactor coil, control board, and safety switches. When this component fails, the system goes completely unresponsive: the thermostat goes blank, the unit won't call for heating or cooling, and no contactors will energize. A blown transformer is often caused by a short in the 24V control wiring or a failed component drawing excess current.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | OEM part number HT01BD236 | Factory-matched output voltage tolerance for stable low-voltage control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01BD236 transformer is wound to exact Carrier factory specifications, ensuring stable 24V output under full load. Generic transformers frequently underperform at rated VA, causing nuisance trips, control board faults, and premature contactor coil failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the disconnect box and verify zero voltage with a multimeter before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Note wire colors or photograph connections before removal. Always inspect the 24V circuit for shorts before energizing the new transformer.\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 as a direct OEM replacement for Carrier model \u003cstrong\u003eC4850C50Z2060900\u003c\/strong\u003e packaged units. Verify primary voltage (120V) and VA rating on your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — call or chat today and we'll get your system back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909800874355,"sku":"CARRIE-C4850C50Z2060900-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909800907123,"sku":"CARRIE-C4850C50Z2060900-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_c324aaf0-4289-4b3c-8a5f-7163c34e5f13.jpg?v=1782899154","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50z2060900-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}