{"product_id":"carrier-c4850c48zg035200-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V\/24V for C4850C48ZG035200","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD236 for Model C4850C48ZG035200\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C4850C48ZG035200\u003c\/strong\u003e packaged unit. The transformer steps down line voltage (120V primary) to the 24V secondary signal used by the control board, thermostat, contactor coil, and all low-voltage safety circuits. When this component fails, the entire control circuit loses power — the result is a completely unresponsive system: no thermostat communication, no contactor engagement, and no heating or cooling output whatsoever.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | Factory-matched OEM tolerances | Replaces OEM part number HT01BD236\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine OEM Carrier transformer wound to exact VA and voltage specifications. Generic transformers with underrated VA capacity can overheat under full control-circuit load, causing repeated nuisance failures and potential damage to downstream boards and thermostats.\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. Photograph existing wiring connections before disconnecting. Verify 24V output with a multimeter after installation before restoring full system power.\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 climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eC4850C48ZG035200\u003c\/strong\u003e packaged unit. Confirm your unit's control circuit voltage and VA requirements match 120V\/24V 40VA before ordering. Cross-reference OEM part number HT01BD236 on your unit's wiring diagram or data plate for exact fitment. Have questions about compatibility? Our HVAC parts specialists verify fitment before you buy — no guesswork required. \u003cstrong\u003eOrder today and your part ships the same business day.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909867262323,"sku":"CARRIE-C4850C48ZG035200-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909867295091,"sku":"CARRIE-C4850C48ZG035200-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_db3ad293-513a-4289-a45c-1e9c9985b5b5.jpg?v=1782940082","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c48zg035200-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}