{"product_id":"carrier-c4850c48zn030600-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C48ZN030600 — Ships Today","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model C4850C48ZN030600\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified 40VA step-down transformer for the \u003cstrong\u003eCarrier C4850C48ZN030600\u003c\/strong\u003e packaged unit. The transformer converts 120V line voltage to the 24V signal voltage that powers your entire control circuit — including the thermostat, contactor coil, and gas valve. When this component fails, the system goes completely unresponsive: the thermostat goes dark, no relays click, and no heating or cooling cycle initiates. It is often one of the first components to check when the entire control system appears dead.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Screw or quick-connect terminals | Factory-matched output tolerance for reliable low-voltage control circuit operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers like the HT01BD236 meet Carrier's exact VA rating and insulation class. Undersized or off-brand units can overheat under full control-circuit load, causing nuisance tripping of the internal thermal fuse and repeat failures.\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 screwdriver, multimeter, wire nuts or terminal connectors. Verify 24V output with a meter before restoring power. Photograph wiring before disconnecting any leads.\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\u003eC4850C48ZN030600\u003c\/strong\u003e packaged unit. Confirm your existing transformer's VA rating and primary\/secondary voltages on the unit's data plate or wiring diagram before ordering. If you have questions about fitment, our HVAC parts specialists verify compatibility before you purchase — call or chat today. Order now and receive same-day shipping on all in-stock OEM Carrier parts.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909860315507,"sku":"CARRIE-C4850C48ZN030600-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909860348275,"sku":"CARRIE-C4850C48ZN030600-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_0343688e-9c23-43b6-a518-4dfc28a2b1df.jpg?v=1782938814","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c48zn030600-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}