{"product_id":"carrier-ph3gpaa36000aa-transformer-h3025m","title":"OEM Carrier Transformer 75VA 208\/240\/480V→24V for PH3GPAA36000AA","description":"\u003ch1\u003eOEM Carrier Control Transformer 75VA 208\/240\/480V → 24VAC for Model PH3GPAA36000AA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD242\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier PH3GPAA36000AA\u003c\/strong\u003e packaged heat pump unit. The transformer steps down line-voltage power (208\/240\/480V primary) to the 24VAC signal that energizes the entire low-voltage control circuit — thermostats, contactors, reversing valves, and the control board all depend on it. When the transformer fails, the system goes completely silent: no thermostat response, no contactor pull-in, and no error codes — because the control circuit has lost its power source entirely. A failed transformer is often misdiagnosed as a board failure; always confirm 24VAC output at the secondary before condemning other components.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 75VA rating | Primary: 208\/240\/480VAC, 50\/60Hz | Secondary: 24VAC | Foot-mount configuration | Factory-matched to Carrier PH3GPAA36000AA control circuit load requirements\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound and potted to Carrier's exact VA and impedance tolerances. Undersized or off-spec generic units can overheat under full control-circuit load, tripping internal thermal cutouts and causing intermittent failures that are notoriously difficult to diagnose.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Line-voltage wiring is present inside the unit; always disconnect power at the disconnect box and verify with a multimeter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter, wire nuts or spade connectors. Photograph or label all wiring before disconnecting the old transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. In-stock orders ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as the direct OEM replacement for the \u003cstrong\u003eCarrier PH3GPAA36000AA\u003c\/strong\u003e packaged heat pump unit. Verify your unit's primary voltage (208\/240V or 480V) on the data plate before ordering — both voltages are supported by this multi-tap transformer. Our fitment team is available to confirm compatibility before you buy. Order now and get same-day shipping on all in-stock parts.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641351688563,"sku":"CARRIE-PH3GPAA36000AA-TRANSFORMER-HT01BD242","price":70.2,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641351721331,"sku":"CARRIE-PH3GPAA36000AA-TRANSFORMER-HT01BD242-GEN","price":23.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-HT01BD242_fd7e3065-979a-481e-8334-3bb7bf006e07.jpg?v=1782943349","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph3gpaa36000aa-transformer-h3025m","provider":"National HVAC Parts","version":"1.0","type":"link"}