{"product_id":"carrier-ha1ajx060000aaaa-transformer-h4oyjb","title":"OEM Carrier Transformer 40VA 120\/24V for HA1AJX060000AAAA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model HA1AJX060000AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01AW229\u003c\/strong\u003e) is the factory-specified control circuit transformer for the \u003cstrong\u003eCarrier HA1AJX060000AAAA\u003c\/strong\u003e system. The transformer steps down line voltage (120V) to the 24V AC signal that powers your thermostat, control board, contactor coil, and all low-voltage control components. When the transformer fails, the entire control circuit loses power — the thermostat goes blank, the system stops responding entirely, and no heating or cooling function is possible. A failed transformer is often caused by a downstream wiring short, so always inspect low-voltage wiring before installing a replacement.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | OEM part number HT01AW229 | Factory-matched output voltage and VA capacity for reliable control circuit operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit meets Carrier's exact VA rating and insulation class specifications. Undersized or off-brand transformers can overheat quickly, especially if any low-voltage wiring resistance is marginal, leading to repeat failures and potential control board damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Use your multimeter to confirm 120V input and check for low-voltage shorts before energizing the new transformer.\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 as a direct OEM replacement for the Carrier \u003cstrong\u003eHA1AJX060000AAAA\u003c\/strong\u003e. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or wiring diagram before ordering. If you have any fitment questions, our HVAC parts specialists confirm compatibility before you buy — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909368336755,"sku":"CARRIE-HA1AJX060000AAAA-TRANSFORMER-HT01AW229","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909368369523,"sku":"CARRIE-HA1AJX060000AAAA-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_b32edd21-7d77-481a-9fa0-26e198d3d72f.jpg?v=1782938759","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ha1ajx060000aaaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}