{"product_id":"carrier-hb1bjx024000aaaa-transformer-h4oyjb","title":"OEM Carrier Transformer 40VA 120V\/24V for HB1BJX024000AAAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model HB1BJX024000AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part number \u003cstrong\u003eHT01AW229\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier HB1BJX024000AAAA\u003c\/strong\u003e air handler. The transformer steps down 120V line voltage to the 24V AC signal that powers your thermostat, contactor coils, and control board. When it fails, the entire control circuit goes dead — the thermostat loses power, the system stops responding to calls for heating or cooling, and nothing works. A blown fuse on the secondary side is often the first clue; if replacing the fuse doesn't hold, the transformer itself is the likely culprit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Class 2 control circuit transformer | OEM part number HT01AW229 | Factory-matched impedance and insulation class\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit is wound to Carrier's exact VA and voltage tolerance specifications. Generic transformers can run under-rated VA, causing thermal overload under normal HVAC control loads and shortening service life significantly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label or photograph all wiring connections before removing the old transformer. Verify 24V output with a multimeter before closing the panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders placed by 3 PM local time ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed and tested for the Carrier \u003cstrong\u003eHB1BJX024000AAAA\u003c\/strong\u003e air handler. Confirm your unit's control voltage and VA requirement on the data plate before ordering. If you're unsure of fitment, our HVAC parts specialists verify compatibility before your order ships — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909349331315,"sku":"CARRIE-HB1BJX024000AAAA-TRANSFORMER-HT01AW229","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909349364083,"sku":"CARRIE-HB1BJX024000AAAA-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_b18302f4-0b1b-4c8b-8ec2-f032d17fed9b.jpg?v=1782941559","url":"https:\/\/nationalhvacparts.com\/products\/carrier-hb1bjx024000aaaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}