{"product_id":"carrier-c48a402561-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C48A402561 HT01BD236 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model C48A402561 — HT01BD236\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C48A402561\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V AC signal required by the thermostat, control board, contactor coil, and all low-voltage control circuits. When this transformer fails, the entire control circuit loses power — the thermostat goes blank, the system won't respond to any call for heating or cooling, and nothing operates. It is often the first component to inspect when a unit is completely unresponsive despite confirmed line voltage at the unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V AC | Secondary: 24V AC | Factory OEM part number HT01BD236 | Drop-in replacement with original mounting configuration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances required by Carrier's control boards. Undersized or off-tolerance generic units can cause erratic low-voltage behavior, nuisance tripping, or premature control board damage.\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, needle-nose pliers, multimeter (verify 0V before touching terminals). Label all low-voltage wires before disconnecting. Verify 24V output after installation before closing the cabinet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the Carrier \u003cstrong\u003eC48A402561\u003c\/strong\u003e packaged unit. Always verify your existing transformer's VA rating and primary\/secondary voltages against your unit's data plate before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you order if you have any questions.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909744841075,"sku":"CARRIE-C48A402561-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909744873843,"sku":"CARRIE-C48A402561-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_d2273930-116b-4d55-867b-81257de1f9b7.jpg?v=1782939200","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a402561-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}