{"product_id":"carrier-hb1cjx036000aaaa-transformer-h4oyjb","title":"OEM Carrier Transformer 40VA 120V–24V for HB1CJX036000AAAA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V–24V for Model HB1CJX036000AAAA\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 HB1CJX036000AAAA\u003c\/strong\u003e heat pump system. The transformer steps down line voltage (120V) to the 24V AC signal required by the thermostat, contactor coil, and control board. When this component fails, the entire control circuit goes dead — the thermostat loses power, the system won't respond to any call for heating or cooling, and no diagnostic codes will display on the board.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V AC | Secondary: 24V AC | Direct OEM replacement for part number HT01AW229 | Designed to factory tolerance for the HB1CJX036000AAAA platform\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA ratings and insulation class required by Carrier. Generic alternatives frequently underperform under peak load, causing nuisance brownouts, board resets, or premature contactor coil failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the breaker and disconnect the low-voltage wiring before removal. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Always label or photograph wire connections before disconnecting the old unit.\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 fit for the Carrier \u003cstrong\u003eHB1CJX036000AAAA\u003c\/strong\u003e heat pump. Confirm your existing transformer's VA rating and primary\/secondary voltages on the unit data plate before ordering. Our fitment team is available to verify compatibility — just reach out before you buy. Orders placed before 3 PM EST ship the same business day.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909345202547,"sku":"CARRIE-HB1CJX036000AAAA-TRANSFORMER-HT01AW229","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909345235315,"sku":"CARRIE-HB1CJX036000AAAA-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_258836e7-e848-406f-9a17-1c1307b400dc.jpg?v=1782941941","url":"https:\/\/nationalhvacparts.com\/products\/carrier-hb1cjx036000aaaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}