{"product_id":"carrier-c48a204051-transformer-h302a1","title":"OEM Carrier 40VA 120V to 24V Control Transformer for C48A204051 — Ships Today","description":"\u003ch1\u003eOEM Carrier 40VA Control Circuit Transformer for Model C48A204051\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified step-down transformer for the \u003cstrong\u003eCarrier C48A204051\u003c\/strong\u003e packaged unit. The transformer converts 120V primary voltage to 24V secondary voltage, powering the entire low-voltage control circuit including the thermostat, contactor coil, and control board. When it fails, the system goes completely unresponsive — the thermostat goes blank, nothing calls, and no error codes appear because the control circuit itself has lost power.\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 output tolerance for reliable control circuit performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA specifications for the Carrier C48A204051 control circuit load. Undersized or off-tolerance generic transformers can sag under full control load, causing intermittent lockouts, nuisance tripping, or premature failure of downstream components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Verify 24V output after installation before restoring full system power. Always label or photograph wiring prior to disconnecting the old unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. 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 Designed specifically for the Carrier \u003cstrong\u003eC48A204051\u003c\/strong\u003e packaged unit. Confirm your unit's data plate lists a 40VA, 120V\/24V transformer requirement before ordering. If your control board or thermostat is unresponsive with power confirmed at the disconnect, this transformer is the most common root cause. Our parts specialists are available to verify fitment before you order — don't guess on a control circuit component.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909759390067,"sku":"CARRIE-C48A204051-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909759422835,"sku":"CARRIE-C48A204051-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_f3d6300c-803f-44d1-8cfd-6f6245b018ec.jpg?v=1782899287","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a204051-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}