{"product_id":"carrier-khaic0101aaa-transformer-h4oyjb","title":"OEM Carrier Transformer 40VA 120V\/24V for KHAIC0101AAA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V\/24V for Model KHAIC0101AAA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01AW229\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier KHAIC0101AAA\u003c\/strong\u003e. The control circuit transformer steps down line voltage (120V) to the 24V signal voltage that powers your thermostat, control board, and all low-voltage switching components. When this transformer fails, the entire control circuit goes dead — your thermostat will go blank, the system will not respond to any call for heating or cooling, and nothing will happen when you cycle the breaker. It is often the first component to inspect when a system shows absolutely no signs of life.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input 120VAC | Output 24VAC | 40VA rating | OEM part number HT01AW229 | Factory-matched for Carrier KHAIC0101AAA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances required by the control board. Undersized or off-tolerance generic units can fail prematurely or cause erratic control board behavior, risking damage to downstream components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Verify 24VAC output on the secondary terminals before reconnecting control wiring. Always label low-voltage wires before removing.\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 specifically for the Carrier \u003cstrong\u003eKHAIC0101AAA\u003c\/strong\u003e. Verify your existing transformer's input voltage, output voltage, and VA rating on the unit data plate or existing component label before ordering. Our parts specialists are available to confirm fitment — order with confidence and get your system back online today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909311353203,"sku":"CARRIE-KHAIC0101AAA-TRANSFORMER-HT01AW229","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909311385971,"sku":"CARRIE-KHAIC0101AAA-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_3ae354ef-a042-45dc-ab28-180fe45dc528.jpg?v=1782941693","url":"https:\/\/nationalhvacparts.com\/products\/carrier-khaic0101aaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}