{"product_id":"carrier-c48a302752-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V Control Transformer for C48A302752 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA for Model C48A302752\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 C48A302752\u003c\/strong\u003e packaged unit. The transformer converts 120V line voltage down to the 24V signal required by the control board, thermostat, contactor coil, and all low-voltage safety circuits. When this transformer fails, the entire control circuit goes dead — the thermostat loses communication, the unit won't respond to any call for heating or cooling, and you may measure 0V across the secondary terminals with power confirmed at the primary.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | Class 2 control circuit transformer | OEM part number HT01BD236 | Factory-matched impedance and thermal protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01BD236 transformer is wound to Carrier's exact VA and impedance specifications. Undersized or off-tolerance generic transformers frequently overheat and trip their internal thermal fuse under normal HVAC control loads, leading to repeat failures and nuisance callbacks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power to the unit before beginning. Tools needed: flathead and Phillips screwdriver, multimeter, wire nuts or spade terminals. Photograph all wiring connections before disconnecting. Confirm 24V output at secondary terminals 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 units ship same business day from our warehouse when ordered before 3 PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eC48A302752\u003c\/strong\u003e packaged unit. Verify your existing transformer's VA rating and primary\/secondary voltage on the unit data plate or transformer label before ordering. If your control circuit is blowing fuses repeatedly, inspect for shorted low-voltage wiring before replacing the transformer. Have questions about fitment? Our HVAC parts specialists confirm compatibility before your order ships.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909753786739,"sku":"CARRIE-C48A302752-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909753819507,"sku":"CARRIE-C48A302752-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_2a56a729-11b2-4372-bc90-45823cf2fd4a.jpg?v=1782938802","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a302752-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}