{"product_id":"carrier-ch13na04800gaaba-transformer-h4oyjb","title":"OEM Carrier Transformer 40VA 120V\/24V for CH13NA04800GAABA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model CH13NA04800GAABA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement control transformer (part number \u003cstrong\u003eHT01AW229\u003c\/strong\u003e) is the factory-specified unit for the \u003cstrong\u003eCarrier CH13NA04800GAABA\u003c\/strong\u003e split-system condenser. The transformer steps down 120V line voltage to the 24V signal used by the thermostat, contactor coil, and all low-voltage control circuits. When it fails, the entire control circuit goes dark — the thermostat loses power, the contactor won't energize, and the system sits completely unresponsive even though line voltage is present at the unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V | Secondary: 24V | Factory-matched HT01AW229 OEM part | Hardwired terminal connections\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound to Carrier's exact VA rating and insulation class, ensuring the secondary voltage holds steady under full control-circuit load. Undersized generic transformers can sag below 24V, causing intermittent lockouts and contactor chatter that damages downstream components.\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 screwdrivers, multimeter (verify 0V before touching terminals), wire nuts or spade connectors. Photograph existing wiring before disconnecting. Confirm primary reads ~120V and secondary reads ~24V after installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before 3PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the Carrier \u003cstrong\u003eCH13NA04800GAABA\u003c\/strong\u003e 4-ton split-system condenser. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit's data plate before ordering. Our fitment team is available to confirm compatibility — reach out before you buy if you have any questions.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909626712435,"sku":"CARRIE-CH13NA04800GAABA-TRANSFORMER-HT01AW229","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909626745203,"sku":"CARRIE-CH13NA04800GAABA-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_ebded3ed-45d9-461c-be64-dc30203e4623.jpg?v=1782940771","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ch13na04800gaaba-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}