{"product_id":"carrier-hb1ajx060000aaaa-transformer-h4oyjb","title":"OEM Carrier Transformer 40VA 120V-24V for HB1AJX060000AAAA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model HB1AJX060000AAAA\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 HB1AJX060000AAAA\u003c\/strong\u003e system. Its job is to step down 120V line voltage to the 24V AC signal that powers your thermostat, control board, contactor coil, and all low-voltage switching circuits. When this transformer fails, the entire control circuit goes dead — your thermostat goes blank, the system won't respond to calls for heating or cooling, and no components energize. If you've verified your thermostat and control board are intact but still have no low-voltage signal, the transformer is the first component to test.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01AW229 | Factory-matched output tolerance for stable low-voltage operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers deliver precise, stable 24V output under full load. Generic units often drift under demand, causing erratic thermostat behavior, nuisance lockouts, and premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Verify primary and secondary voltages after install before closing the panel.\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\u003eHB1AJX060000AAAA\u003c\/strong\u003e. Always verify the existing transformer's VA rating and primary\/secondary voltages on the equipment data plate before ordering. Our fitment team is available to confirm compatibility before you buy — same-day shipping on all in-stock orders.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909350478195,"sku":"CARRIE-HB1AJX060000AAAA-TRANSFORMER-HT01AW229","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909350510963,"sku":"CARRIE-HB1AJX060000AAAA-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_b123e727-232a-4ac3-8500-990b6c76cd39.jpg?v=1782939903","url":"https:\/\/nationalhvacparts.com\/products\/carrier-hb1ajx060000aaaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}