{"product_id":"carrier-ch13na04900gabaa-transformer-h4oyjb","title":"OEM Carrier Transformer 40VA 120V\/24V for CH13NA04900GABAA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA for Model CH13NA04900GABAA\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part# \u003cstrong\u003eHT01AW229\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier CH13NA04900GABAA\u003c\/strong\u003e split-system condenser. The transformer steps down 120V line voltage to the 24V signal voltage that powers your thermostat, contactor coil, and all low-voltage control circuits. When it fails, the entire control system goes dark — the thermostat loses power, nothing responds, and the system will not heat or cool at all. A blown transformer is often caused by a shorted wire or failed component downstream, so always inspect the control circuit before installing a replacement.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Factory-matched OEM construction | Screw or quick-connect terminals | Meets UL Class 2 output requirements\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01AW229 transformer is wound and rated to Carrier's exact VA specification, ensuring the 24V control circuit maintains stable voltage under full load. Generic transformers rated at lower VA can sag under load, causing erratic contactor chattering and nuisance lockouts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (verify 24V output after installation). Photograph all wiring connections before removing the old transformer.\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 Designed as a direct OEM replacement for \u003cstrong\u003eCarrier CH13NA04900GABAA\u003c\/strong\u003e split-system units. Cross-reference OEM part number \u003cstrong\u003eHT01AW229\u003c\/strong\u003e and verify your existing transformer's VA rating and terminal configuration on the unit data plate before ordering. Our fitment team is available to confirm compatibility before you buy — same-day shipping available on all in-stock orders.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909625139571,"sku":"CARRIE-CH13NA04900GABAA-TRANSFORMER-HT01AW229","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909625172339,"sku":"CARRIE-CH13NA04900GABAA-TRANSFORMER-HT01AW229-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-HT01AW229_8e978766-2710-4210-86c5-25f785ebadef.jpg?v=1782940774","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ch13na04900gabaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}