{"product_id":"carrier-ha1cjx030000aaaa-transformer-h4oyjb","title":"OEM Carrier Transformer 40VA 120V\/24V for HA1CJX030000AAAA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V to 24V for Model HA1CJX030000AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part number \u003cstrong\u003eHT01AW229\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier HA1CJX030000AAAA\u003c\/strong\u003e system. The transformer steps down 120V line voltage to the 24V AC signal that powers your thermostat, control board, contactor coil, and all low-voltage safety circuits. When this component fails, the entire control circuit loses power — the thermostat goes dark, the system will not respond to any calls for heating or cooling, and no error codes can even be generated. It is often the first part to check when a unit appears completely dead with no obvious tripped breaker.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary input | 24V secondary output | Factory-matched OEM winding and core specification for Carrier HA1CJX030000AAAA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers (HT01AW229) are wound and insulated to Carrier's exact VA tolerance, protecting downstream boards and contactors from voltage sag. Generic units may run under-rated VA, causing nuisance lockouts under full control-circuit load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the breaker and disconnect panel before beginning. Tools needed: flathead and Phillips screwdriver, wire stripper, multimeter. Verify secondary output reads 24–28V AC after installation before closing the cabinet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eHA1CJX030000AAAA\u003c\/strong\u003e unit using OEM part number HT01AW229. Always verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate before ordering to confirm fitment. Our parts specialists are available to verify compatibility before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909357130099,"sku":"CARRIE-HA1CJX030000AAAA-TRANSFORMER-HT01AW229","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909357162867,"sku":"CARRIE-HA1CJX030000AAAA-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_b2a44bbb-5e3e-477e-9101-5a81f9f2741a.jpg?v=1782941537","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ha1cjx030000aaaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}