{"product_id":"carrier-ch13na04200gaaaa-transformer-h4oyjb","title":"OEM Carrier Transformer 40VA 120V-24V for CH13NA04200GAAAA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model CH13NA04200GAAAA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01AW229\u003c\/strong\u003e) is the factory-specified step-down transformer for the \u003cstrong\u003eCarrier CH13NA04200GAAAA\u003c\/strong\u003e split-system air conditioner. The transformer converts 120V line voltage to the 24V AC signal that powers the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When this transformer fails, the entire system goes silent: the thermostat loses power, the contactor won't energize, and nothing responds. If you're getting 120V at the unit but zero voltage at the low-voltage terminals, a failed transformer is the most likely culprit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input 120V AC | Output 24V AC | 40VA rating | OEM part number HT01AW229 | Factory-matched construction for long service life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01AW229 transformer is wound to exact factory VA and voltage tolerances, protecting downstream components like the control board and contactor coil. Generic transformers can underperform on VA capacity, causing brownouts in the control circuit and premature component failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and confirm zero voltage before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire strippers, and appropriately rated wire nuts. Label all low-voltage wire connections before removal. Verify output voltage after installation before restoring full system power.\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 Engineered specifically for the Carrier \u003cstrong\u003eCH13NA04200GAAAA\u003c\/strong\u003e condensing unit. Always verify your existing transformer's input\/output voltage and VA rating against your unit's data plate before ordering to ensure proper fitment. Our parts specialists are available to confirm compatibility before you buy — order with confidence and get your system back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909630120307,"sku":"CARRIE-CH13NA04200GAAAA-TRANSFORMER-HT01AW229","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909630153075,"sku":"CARRIE-CH13NA04200GAAAA-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_1957ac8d-b335-417d-a65f-5a559d20c74c.jpg?v=1782939409","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ch13na04200gaaaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}