{"product_id":"carrier-c4850c50ay02061-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C50AY02061 — Ships Today","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V\/24V for Model C4850C50AY02061\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C4850C50AY02061\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V signal voltage that powers your thermostat, control board, contactor coil, and all low-voltage safety circuits. When this transformer fails, the entire control circuit goes dead — the thermostat goes blank, the system refuses to respond to any command, and no heating or cooling stage will initiate. It is often the first component to inspect when a unit shows zero response despite having confirmed line voltage at the unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V | Secondary: 24V | OEM part number HT01BD236 | Factory-matched construction and terminal configuration for drop-in replacement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit is wound and insulated to Carrier factory specifications, ensuring correct VA output under load. Undersized or off-tolerance generic transformers can sag under full control-circuit load, causing intermittent lockouts, nuisance trips, and premature contactor coil failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Verify 24V output at secondary terminals after installation before restoring full system power. Label or photograph all low-voltage wiring before disconnecting.\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 as a direct OEM replacement for the \u003cstrong\u003eCarrier C4850C50AY02061\u003c\/strong\u003e packaged unit. Always verify primary voltage and VA rating on your unit's data plate before ordering to confirm fitment. Our parts specialists are available to verify compatibility before you order — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909813752179,"sku":"CARRIE-C4850C50AY02061-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909813784947,"sku":"CARRIE-C4850C50AY02061-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_feb05cfd-9443-4f7d-ba42-6b7b3876cfcf.jpg?v=1782938942","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50ay02061-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}