{"product_id":"carrier-c4850c48z6075610-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V-24V for C4850C48Z6075610","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model C4850C48Z6075610\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part# \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C4850C48Z6075610\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 120V to 24V to power the entire low-voltage control circuit — including the thermostat, contactor coil, gas valve, and control board. When the transformer fails, \u003cem\u003enothing\u003c\/em\u003e in the system responds: the thermostat goes blank, no relays click, and the unit will not attempt to start in any mode. A failed transformer is often caused by a shorted control component that draws excess current, so always inspect the secondary circuit before replacing.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V | Secondary: 24V | OEM part# HT01BD236 | Factory-matched impedance and thermal protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers include built-in secondary overcurrent protection calibrated to Carrier's control circuit draw. Generic units often lack proper thermal cutoffs, risking repeat failures if an underlying short is present.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output and check for secondary shorts). Label all wires before disconnecting. Confirm 24V on secondary terminals before reassembling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. 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\u003eC4850C48Z6075610\u003c\/strong\u003e packaged unit. Verify transformer VA rating and primary\/secondary voltages on your unit's wiring diagram or data plate before ordering. If you have questions about fitment, our HVAC parts specialists confirm compatibility before you buy — no guesswork.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909871391091,"sku":"CARRIE-C4850C48Z6075610-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909871423859,"sku":"CARRIE-C4850C48Z6075610-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_15b64846-7074-4e43-bef5-94c57bb51210.jpg?v=1782939276","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c48z6075610-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}