{"product_id":"carrier-ph10ja04800gabaa-transformer-h4oyjb","title":"OEM Carrier Transformer 120V–24V 40VA for PH10JA04800GABAA","description":"\u003ch1\u003eOEM Carrier Control Transformer 120V–24V 40VA for Model PH10JA04800GABAA\u003c\/h1\u003e\u003cp\u003eThis OEM step-down transformer (part number \u003cstrong\u003eHT01AW229\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier PH10JA04800GABAA\u003c\/strong\u003e packaged heat unit. The transformer converts 120V line voltage to the 24V AC signal that powers your thermostat, control board, contactor coils, and all low-voltage safety circuits. When this component fails, the entire control circuit goes dead — the thermostat goes blank, the system produces no response to any call for heating or cooling, and no fault codes will display because the board itself has lost power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Primary voltage: 120V AC | Secondary voltage: 24V AC | VA rating: 40VA | Factory-matched impedance and thermal protection | Direct OEM replacement for HT01AW229\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine OEM part built to Carrier's exact VA rating and insulation class. Generic transformers often deviate in VA capacity, leading to overheating under full control-circuit load and premature failure — particularly in multi-stage systems with several relay coils energized simultaneously.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Photograph existing wiring connections before removal. Typical service time: 20–30 minutes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. In stock and ships same business day from our warehouse when ordered before 3 PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the \u003cstrong\u003eCarrier PH10JA04800GABAA\u003c\/strong\u003e packaged heating unit. Always verify your existing transformer's primary\/secondary voltage and VA rating from the unit's data plate or wiring diagram before ordering. If you have any fitment questions, our HVAC parts specialists are available to confirm compatibility before you purchase — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641986666867,"sku":"CARRIE-PH10JA04800GABAA-TRANSFORMER-HT01AW229","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641986699635,"sku":"CARRIE-PH10JA04800GABAA-TRANSFORMER-HT01AW229-GEN","price":30.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01AW229_903325b2-9c73-4ab0-9bb0-7d8886c7be6d.jpg?v=1775041052","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph10ja04800gabaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}