{"product_id":"carrier-ch13na02400gaaaa-transformer-h4oyjb","title":"OEM Carrier Transformer 40VA 120V\/24V for CH13NA02400GAAAA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model CH13NA02400GAAAA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01AW229\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier CH13NA02400GAAAA\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 circuitry. When this part fails, the entire control circuit goes dead — the thermostat goes blank, the contactor never pulls in, and the system will not respond to any call for cooling. If you've confirmed 120V at the unit but have no 24V at the secondary terminals, this transformer is your likely culprit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01AW229 | Factory-matched construction for direct drop-in fit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit is wound to Carrier's exact VA and voltage specifications, ensuring reliable 24V output under full control-circuit load. Undersized generic transformers can sag voltage under load, causing erratic contactor behavior and nuisance lockouts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the disconnect before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 0V before touching wiring and to confirm 24V output after install). Photograph existing wiring connections before disconnecting leads.\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 and factory-specified for the Carrier \u003cstrong\u003eCH13NA02400GAAAA\u003c\/strong\u003e split-system condenser. Always verify your existing transformer's primary\/secondary voltage and VA rating against your unit's data plate before ordering. Our parts specialists are available to confirm fitment — just reach out before you buy. Order today and your part ships the same business day.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909639786867,"sku":"CARRIE-CH13NA02400GAAAA-TRANSFORMER-HT01AW229","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909639819635,"sku":"CARRIE-CH13NA02400GAAAA-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_5ce1b15e-c390-4787-bf6b-573a648bbbca.jpg?v=1782940744","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ch13na02400gaaaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}