{"product_id":"carrier-c48a302761-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V Control Transformer for C48A302761 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD236 for Model C48A302761\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C48A302761\u003c\/strong\u003e packaged unit. The transformer is the backbone of your system's low-voltage control circuit, stepping 120V line voltage down to the 24V signal voltage required by your thermostat, contactor coil, gas valve, and control board. When this transformer fails, the entire control circuit goes dead — no thermostat response, no contactor click, nothing starts. If you're getting 120V in but zero 24V output, this transformer is the most likely culprit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | Class 2 transformer | Factory-matched OEM replacement for part number HT01BD236\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit is wound to exact factory VA and voltage tolerances, ensuring proper inrush current handling during contactor pulls. Undersized or off-tolerance generic transformers can overheat and trip their internal thermal cutout, causing intermittent no-start conditions that are difficult to diagnose.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter, wire nuts or push-in connectors. Label all low-voltage wiring before disconnecting. Verify 120V input and 24V output with a multimeter after installation before closing the panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders received by 3 PM ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Fits Carrier model \u003cstrong\u003eC48A302761\u003c\/strong\u003e packaged unit. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit's data plate before ordering. Our HVAC parts specialists are available to confirm fitment — reach out before you order if you have any questions.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909753721203,"sku":"CARRIE-C48A302761-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909753753971,"sku":"CARRIE-C48A302761-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_8368c086-d663-419e-9710-3d243321eae4.jpg?v=1782938804","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a302761-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}