{"product_id":"carrier-c4850c50z2055500-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V Control Transformer for C4850C50Z2055500 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model C4850C50Z2055500\u003c\/h1\u003e\u003cp\u003eThis is the factory-specified OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C4850C50Z2055500\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V AC signal that powers your entire control circuit — including the thermostat, contactor coil, gas valve, and all low-voltage safety switches. When this transformer fails, the result is total system shutdown: the thermostat goes dark, nothing responds, and no heating or cooling can be initiated. A blown control fuse is often the first clue, but a failed transformer is frequently the root cause.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | OEM part number HT01BD236 | Factory-matched output for reliable low-voltage control circuit performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01BD236 transformer is wound and insulated to Carrier's exact VA and voltage tolerance specifications. Generic replacements may deliver inconsistent secondary voltage, causing nuisance lockouts, contactor chatter, or premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade terminals. Verify primary and secondary voltage with a multimeter 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 specifically for the Carrier \u003cstrong\u003eC4850C50Z2055500\u003c\/strong\u003e packaged unit. Always verify your existing transformer's VA rating and voltage configuration against your unit's data plate before ordering. If you need help confirming fitment, our HVAC parts team is ready to assist before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909802348915,"sku":"CARRIE-C4850C50Z2055500-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909802381683,"sku":"CARRIE-C4850C50Z2055500-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_16df6dce-a30f-4ace-8e7f-899ac07d1ad7.jpg?v=1782938789","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50z2055500-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}