{"product_id":"carrier-ha1bjx024000aeaa-transformer-h4oyjb","title":"OEM Carrier Transformer 40VA 120V\/24V for HA1BJX024000AEAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01AW229 for Model HA1BJX024000AEAA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement control transformer (part# \u003cstrong\u003eHT01AW229\u003c\/strong\u003e) is the factory-specified unit for the \u003cstrong\u003eCarrier HA1BJX024000AEAA\u003c\/strong\u003e air handler. The transformer steps down line voltage (120V) to the 24V AC signal that powers your thermostat, control board, and all low-voltage switching components. When this transformer fails — due to a wiring short, voltage spike, or age — absolutely nothing in the system will respond: the thermostat goes dark, the blower won't run, and no heating or cooling calls are processed. If you've confirmed 120V at the air handler but zero voltage on the secondary side, this is your part.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V AC | Secondary: 24V AC | Class 2 transformer | Replaces OEM part number HT01AW229\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This factory OEM unit is wound to exact VA and voltage tolerances for the Carrier HA1BJX024000AEAA. Off-brand transformers may underperform under load, causing nuisance lockouts or premature control board failures due to voltage sag.\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, multimeter, wire nuts or spade connectors. Photograph all wiring connections before removal. Verify 0V at all terminals before touching leads.\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 \u003cstrong\u003eCarrier HA1BJX024000AEAA\u003c\/strong\u003e air handler. Confirm your existing transformer reads 40VA 120V\/24V on its label before ordering. If your unit has been modified or rewired, verify secondary load does not exceed 40VA. Our fitment team is available to confirm compatibility before you buy — order with confidence and get your system back online today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909364765043,"sku":"CARRIE-HA1BJX024000AEAA-TRANSFORMER-HT01AW229","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909364797811,"sku":"CARRIE-HA1BJX024000AEAA-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_794f7d5e-6e4e-4480-bb78-1dbae55c1b49.jpg?v=1782941500","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ha1bjx024000aeaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}