{"product_id":"carrier-c4850c48zn090610-transformer-h302a1","title":"OEM Carrier 40VA 120V to 24V Step-Down Transformer for C4850C48ZN090610 — Ships Today","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V\/24V for Model C4850C48ZN090610\u003c\/h1\u003e\u003cp\u003eThis is the OEM factory-specified replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C4850C48ZN090610\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 120V to the 24V AC signal used by your thermostat, control board, contactor coil, and all other low-voltage control components. When the transformer fails, the entire control circuit goes dead — the thermostat goes blank, the system won't respond to calls for heating or cooling, and nothing happens at the unit whatsoever. This is one of the most commonly misdiagnosed failures in packaged HVAC equipment.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 120V primary | 24V secondary | 40VA rating | OEM part number HT01BD236 | Factory-matched output for Carrier low-voltage control circuits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01BD236 transformer is wound to exact Carrier specifications, ensuring stable 24V output under full load. Generic transformers often fall short of rated VA capacity, causing nuisance tripped fuses and erratic control behavior under peak demand.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power to the unit before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Confirm 24V output with a multimeter after installation before restoring full power. Always check for a shorted control wire that may have caused the original transformer failure.\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\u003eC4850C48ZN090610\u003c\/strong\u003e packaged unit. Verify transformer primary\/secondary voltage and VA rating on your unit's data plate or wiring diagram before ordering. If you are unsure of fitment, our technical team is available to confirm compatibility before you purchase. Order today and receive same-day shipping on all in-stock OEM Carrier parts.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909849796979,"sku":"CARRIE-C4850C48ZN090610-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909849829747,"sku":"CARRIE-C4850C48ZN090610-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_a8c630f5-d296-4b3d-a6d4-9ee778e85ea2.jpg?v=1782899378","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c48zn090610-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}