{"product_id":"carrier-c4850c50aw02751-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C50AW02751 — Ships Today","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA for Model C4850C50AW02751\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part# HT01BD236) is the factory-specified step-down transformer for the \u003cstrong\u003eCarrier C4850C50AW02751\u003c\/strong\u003e packaged unit. Its job is to convert 120V line voltage down to the 24V that powers your entire control circuit — including the thermostat, contactor coil, gas valve, and control board. When this transformer fails, absolutely nothing responds: the thermostat goes blank, the system is completely dead, and no fault codes appear because the control circuit itself has lost power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120VAC | Secondary: 24VAC | OEM part number HT01BD236 | Factory-matched impedance and thermal protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers from Carrier use precision-wound coils matched to the exact VA load of the C4850C50AW02751 control circuit. Generic units may be undersized for peak load, causing nuisance tripping or premature burnout under high thermostat demand cycles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter (to confirm 24V output after install), wire nuts or terminals. Label all low-voltage wires before disconnecting. Verify the 3-amp fuse on the control board is intact before condemning the transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the \u003cstrong\u003eCarrier C4850C50AW02751\u003c\/strong\u003e packaged unit. Verify your existing transformer's VA rating and primary\/secondary voltage from the data plate or unit wiring diagram before ordering. If you're unsure of fitment, our HVAC parts specialists confirm compatibility before you buy — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909822992755,"sku":"CARRIE-C4850C50AW02751-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909823025523,"sku":"CARRIE-C4850C50AW02751-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_097cbde6-0bd1-453c-bb5a-e85197c84ab5.jpg?v=1782938900","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50aw02751-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}