{"product_id":"carrier-ph13nr030000aaaa-transformer-h4oyjb","title":"OEM Carrier Transformer 40VA 24V for PH13NR030000AAAA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 24V for Model PH13NR030000AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part number \u003cstrong\u003eHT01AW229\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier PH13NR030000AAAA\u003c\/strong\u003e packaged heat pump unit. The control transformer steps down line voltage (120V) to the 24V AC signal that powers the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When this transformer fails, the system goes completely dark: no thermostat response, no contactor pull-in, and no heating or cooling at all.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input: 120V AC | Output: 24V AC | 40VA rating | Factory OEM part number HT01AW229 | Direct drop-in replacement with matched mounting footprint\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01AW229 transformer is wound to exact Carrier specifications, ensuring stable 24V output under full control-circuit load. Generic alternatives can drift under load, causing intermittent lockouts and nuisance tripping of downstream controls.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Always disconnect power at the disconnect box before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output post-install). Label low-voltage wiring before disconnecting from terminals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Stocked in our warehouse and ships same business day when ordered before cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as a direct OEM replacement for the \u003cstrong\u003eCarrier PH13NR030000AAAA\u003c\/strong\u003e packaged heat pump. Verify your unit's data plate and existing transformer VA and voltage ratings before ordering to confirm fitment. Our parts specialists are available to verify compatibility before you buy — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641880105331,"sku":"CARRIE-PH13NR030000AAAA-TRANSFORMER-HT01AW229","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641880138099,"sku":"CARRIE-PH13NR030000AAAA-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_ba8b988b-f217-494d-b375-86e249cfc05f.jpg?v=1782942666","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph13nr030000aaaa-transformer-h4oyjb","provider":"National HVAC Parts","version":"1.0","type":"link"}