{"product_id":"carrier-ph3gpaa30000aa-transformer-h3025m","title":"OEM Carrier Transformer 75VA 208\/240\/480V–24V for PH3GPAA30000AA","description":"\u003ch1\u003eOEM Carrier 75VA Control Transformer HT01BD242 for Model PH3GPAA30000AA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part #HT01BD242) is the factory-specified replacement for the \u003cstrong\u003eCarrier PH3GPAA30000AA\u003c\/strong\u003e packaged HVAC unit. The transformer steps down high-voltage line power — 208, 240, or 480V primary — to the \u003cstrong\u003e24V AC secondary\u003c\/strong\u003e signal that energizes your system's entire control circuit, including the thermostat, contactor coils, and safety switches. When this part fails, absolutely nothing responds: the thermostat goes dark, the system refuses to start, and no safety components receive power. It is one of the first parts to test when a unit goes completely unresponsive.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 75VA rating | 208\/240\/480V primary input | 24V AC secondary output | 50\/60 Hz | Foot-mount configuration | OEM part number HT01BD242\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM transformer wound to exact factory VA and voltage tolerances. Generic transformers can deviate in VA capacity and insulation rating, risking premature burnout under full control-circuit load — especially in multi-stage packaged units like the PH3GPAA30000AA.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Requires shutting off power at the disconnect before any work. Label and photograph all 24V low-voltage wiring before disconnecting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Licensed technician installation strongly recommended.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. In-stock units ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the \u003cstrong\u003eCarrier PH3GPAA30000AA\u003c\/strong\u003e packaged unit. The 75VA, 208\/240\/480V-to-24V specification also makes this transformer a cross-compatible fit for select Bryant, Payne, and ICP family units — always verify your data plate VA rating and primary voltage before ordering. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641352638835,"sku":"CARRIE-PH3GPAA30000AA-TRANSFORMER-HT01BD242","price":70.2,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641352671603,"sku":"CARRIE-PH3GPAA30000AA-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_4fbe8a6c-beee-4407-8841-064c3e7636e2.jpg?v=1782943283","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph3gpaa30000aa-transformer-h3025m","provider":"National HVAC Parts","version":"1.0","type":"link"}