{"product_id":"carrier-hgrh50hj441646-transformer-h3025m","title":"OEM Carrier Transformer 40VA 120V\/24V for HGRH50HJ441646","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model HGRH50HJ441646\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD242\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier HGRH50HJ441646\u003c\/strong\u003e. The transformer steps down line voltage (120V) to the 24V AC signal used by your thermostat, control board, contactor coil, and all low-voltage control circuits. When it fails, the entire control circuit goes dead — your thermostat goes blank, the system won't respond to any calls for heating or cooling, and nothing happens when you adjust the setpoint. A failed transformer is often caused by a shorted low-voltage wire, so always check for wiring faults before installing a replacement.\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: HT01BD242 | Factory-matched output for full control circuit compatibility\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit is wound to Carrier's exact VA rating and insulation class, ensuring reliable low-voltage output under sustained load. Generic transformers frequently run at reduced VA capacity, causing voltage sag that confuses control boards and shortens contactor coil life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and verify voltage is zero before proceeding. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label or photograph all wiring connections before removal. Test secondary output (should read 24–28V AC) after installation before restoring full system power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders placed by 3 PM ship the same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as a direct OEM replacement for the Carrier \u003cstrong\u003eHGRH50HJ441646\u003c\/strong\u003e. Confirm your existing transformer's primary\/secondary voltage and VA rating on its label before ordering to ensure proper fitment. Our parts specialists are available to verify compatibility prior to purchase — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909327835507,"sku":"CARRIE-HGRH50HJ441646-TRANSFORMER-HT01BD242","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909327868275,"sku":"CARRIE-HGRH50HJ441646-TRANSFORMER-HT01BD242-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-HT01BD242_0260614f-042c-4f09-bf36-daeaafaefe6b.jpg?v=1782941652","url":"https:\/\/nationalhvacparts.com\/products\/carrier-hgrh50hj441646-transformer-h3025m","provider":"National HVAC Parts","version":"1.0","type":"link"}