{"product_id":"carrier-ha1ajx024000abaa-transformer-h4oyjb","title":"OEM Carrier Transformer 40VA 120V-24V for HA1AJX024000ABAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01AW229 for Model HA1AJX024000ABAA\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part# \u003cstrong\u003eHT01AW229\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier HA1AJX024000ABAA\u003c\/strong\u003e air handler. The transformer steps down 120V line voltage to the 24V signal required by the control board, thermostat, and all low-voltage switching circuits. When this component fails, the entire control circuit goes dark — your thermostat shows no response, the system won't stage heating or cooling, and no error codes appear because the board itself has no power to report them.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | Factory OEM part number HT01AW229 | Class 2 transformer | Designed for continuous duty in forced-air air handler applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and impedance specifications for the Carrier control board. Undersized or off-tolerance generic units can droop voltage under load, causing erratic board behavior, nuisance lockouts, or premature contactor failure — problems that look like a bad board but are actually transformer-related.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, wire stripper, multimeter. Verify 24V output after installation before restoring full system power. Always photograph existing wiring before disconnecting.\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 for the Carrier \u003cstrong\u003eHA1AJX024000ABAA\u003c\/strong\u003e air handler. Confirm your existing transformer's VA rating and primary\/secondary voltage on the unit data plate before ordering to ensure a proper match. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — contact us before placing your order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909371023731,"sku":"CARRIE-HA1AJX024000ABAA-TRANSFORMER-HT01AW229","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909371056499,"sku":"CARRIE-HA1AJX024000ABAA-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_9c69de91-f5bf-4ec4-a089-da84f439dc54.jpg?v=1782939865","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ha1ajx024000abaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}