{"product_id":"carrier-c4850c50zg040200-transformer-h302a1","title":"OEM Carrier 40VA 120V to 24V Control Transformer HT01BD236 for C4850C50ZG040200 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD236 for Model C4850C50ZG040200\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer is the factory-specified replacement for the \u003cstrong\u003eCarrier C4850C50ZG040200\u003c\/strong\u003e packaged unit. The transformer steps down line voltage (120V) to 24V AC to power the entire low-voltage control circuit — including the thermostat, contactor coil, gas valve, and control board. When the transformer fails, nothing in the control system responds: the thermostat goes blank, the unit won't energize, and there are no error codes because the board itself has no power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V | Secondary: 24V AC | OEM part number HT01BD236 | Class 2 transformer | Factory-matched output tolerance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage output specs for this unit. Undersized or off-tolerance generic transformers can cause nuisance tripping, board damage, or coil burnout — costing far more than the transformer itself.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Photograph existing wiring connections before removing the old transformer. Confirm secondary output with a meter before restoring power.\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 Fits Carrier model \u003cstrong\u003eC4850C50ZG040200\u003c\/strong\u003e packaged unit. Verify transformer VA rating and primary\/secondary voltages on your unit's wiring diagram or data plate before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — in stock and ready to ship today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909781148019,"sku":"CARRIE-C4850C50ZG040200-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909781180787,"sku":"CARRIE-C4850C50ZG040200-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_dadf9c85-152d-4a04-ac47-b68645f95332.jpg?v=1782899372","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50zg040200-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}