{"product_id":"carrier-c4850c48zn055600-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C48ZN055600 — Ships Today","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model C4850C48ZN055600\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified control circuit transformer for the \u003cstrong\u003eCarrier C4850C48ZN055600\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 120V to the 24V AC required by the thermostat, control board, contactor coil, and all low-voltage safety circuits. When the transformer fails, the entire control circuit goes dead — the thermostat shows no power, the system won't respond to calls for heating or cooling, and in some cases a tripped breaker or burnt smell may be present at the transformer terminals.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Primary voltage: 120V AC | Secondary voltage: 24V AC | VA rating: 40VA | OEM part number: HT01BD236 | Factory-matched for Carrier packaged unit applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01BD236 transformer is wound to exact Carrier factory specifications with proper VA rating and insulation class. Generic transformers often use undersized windings that overheat under full control circuit load, leading to repeat failures and potential damage to connected boards and contactors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Always verify 0V at primary terminals before touching wiring. Label or photograph all low-voltage connections prior to removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Ships same business day from our NationalHVACParts.com warehouse when ordered before cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eC4850C48ZN055600\u003c\/strong\u003e packaged unit. Verify your existing transformer's primary\/secondary voltage and VA rating against your unit's data plate before ordering. If your transformer shows signs of burn marks, cracked insulation, or a blown internal fuse, do not simply replace the transformer without checking for a downstream short in the 24V control circuit — failure to do so may damage the new part. Our technical team is available to verify fitment and help diagnose root cause before you order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909853991283,"sku":"CARRIE-C4850C48ZN055600-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909854024051,"sku":"CARRIE-C4850C48ZN055600-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_5fce2cb6-f1ca-46e4-9418-b5a64a55d5df.jpg?v=1782938831","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c48zn055600-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}