{"product_id":"carrier-c4850c50zg035600-transformer-h302a1","title":"OEM Carrier 40VA 120V to 24V Control Transformer for C4850C50ZG035600 — Ships Today","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD236 for Model C4850C50ZG035600\u003c\/h1\u003e\u003cp\u003eThis is the OEM factory-specified control transformer (part# \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C4850C50ZG035600\u003c\/strong\u003e packaged rooftop unit. The transformer steps down line voltage (120V) 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 becomes unresponsive, the system won't call for heating or cooling, and no fault codes will display because the board itself has no power. Replacing this part with a genuine OEM unit restores full factory-spec performance and protects downstream components from voltage irregularities caused by undersized or out-of-tolerance aftermarket substitutes.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V | Secondary: 24V | OEM part number HT01BD236 | Factory-matched impedance and core rating for Carrier C4850C50ZG035600\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances. Undersized generic transformers can sag under load, causing erratic thermostat behavior, nuisance lockouts, or premature contactor coil failure — making the OEM part the clear long-term value.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter, and wire nuts or spade terminals. Verify incoming voltage is within spec before installing. Always photograph or label existing wiring connections before removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. 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 specifically for the Carrier \u003cstrong\u003eC4850C50ZG035600\u003c\/strong\u003e packaged rooftop unit. Confirm the 40VA, 120V primary \/ 24V secondary specification against your unit's data plate and wiring diagram before ordering. Our HVAC parts specialists are available to verify fitment — order with confidence and get back up and running today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909781410163,"sku":"CARRIE-C4850C50ZG035600-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909781442931,"sku":"CARRIE-C4850C50ZG035600-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_5521a411-871e-4122-a4c9-1298f56e7d43.jpg?v=1782899203","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50zg035600-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}