{"product_id":"carrier-c4850c50aw04161-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C50AW04161 — Ships Today","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD236 for Model C4850C50AW04161\u003c\/h1\u003e\u003cp\u003eThis is the OEM factory-specified control transformer for the \u003cstrong\u003eCarrier C4850C50AW04161\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to 24V to power the entire control circuit — including the thermostat, contactor coil, and control board. When this part fails, the system goes completely silent: no response from the thermostat, no staging, no fan — nothing works. A failed transformer is one of the most common causes of total system non-response and is often misdiagnosed as a control board failure.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e OEM Part No. HT01BD236 | Primary: 120V | Secondary: 24V | 40VA rated | Designed for Carrier packaged unit control circuits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances required by the C4850C50AW04161 control board. Undersized or off-tolerance generic units can overheat, blow fuses repeatedly, or damage downstream control components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the disconnect box before starting. Tools needed: flathead and Phillips screwdrivers, multimeter (to confirm 24V output after install), wire nuts or spade connectors. Photograph existing wiring before removal. Verify fuse integrity before condemning the 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 HVAC parts warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Direct OEM replacement for Carrier model \u003cstrong\u003eC4850C50AW04161\u003c\/strong\u003e packaged units. Confirm your existing transformer's primary\/secondary voltage and VA rating on the unit data plate before ordering. If your system is blowing 24V fuses repeatedly, test the transformer secondary under load with a multimeter — a reading significantly below 24V confirms transformer failure. Our fitment team is available to verify compatibility before you order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909816734067,"sku":"CARRIE-C4850C50AW04161-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909816766835,"sku":"CARRIE-C4850C50AW04161-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_639e6c51-609d-4db8-b4bb-419208ad8057.jpg?v=1782938922","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50aw04161-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}