{"product_id":"carrier-ph4gnaa60000aa-transformer-h3025m","title":"OEM Carrier Transformer 75VA 208\/240\/480V–24V for PH4GNAA60000AA","description":"\u003ch1\u003eOEM Carrier 75VA Control Transformer HT01BD242 for Model PH4GNAA60000AA\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM replacement control transformer for the \u003cstrong\u003eCarrier PH4GNAA60000AA\u003c\/strong\u003e packaged heat pump unit. The transformer steps down high-voltage primary power (208\/240\/480V) to the 24VAC signal voltage that powers your thermostat, contactor coil, and all low-voltage control circuits. When this transformer fails, the entire control circuit goes dark — your thermostat loses power, the system won't respond to any calls for heating or cooling, and you may measure zero voltage at the 24V secondary terminals. It is one of the first components to check in a complete system no-response diagnosis.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 75VA rated | Primary: 208\/240\/480VAC | Secondary: 24VAC | 50\/60Hz | Foot-mount configuration | OEM Part #HT01BD242\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This factory-original Carrier transformer is wound to exact VA and voltage tolerances. Undersized or off-tolerance aftermarket transformers can overheat under full control-circuit load, leading to repeat failures and potential damage to boards and contactors downstream.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power to the unit before beginning. Tools needed: multimeter, flathead and Phillips screwdrivers, wire stripper, needle-nose pliers. Label or photograph all low-voltage wiring before disconnecting. Verify 24V output at secondary terminals before closing the panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. In-stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Direct OEM replacement for \u003cstrong\u003eCarrier PH4GNAA60000AA\u003c\/strong\u003e packaged heat pump units. Also cross-references to Carrier furnace, air conditioner, and RTU applications with matching 75VA and 208\/240\/480V primary specifications. Always verify your unit's data plate voltage requirements before ordering. Have a fitment question? Our HVAC parts team confirms compatibility before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641230840179,"sku":"CARRIE-PH4GNAA60000AA-TRANSFORMER-HT01BD242","price":70.2,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641230872947,"sku":"CARRIE-PH4GNAA60000AA-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_259fb5db-9d0e-4687-b400-56782f359c73.jpg?v=1782943322","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph4gnaa60000aa-transformer-h3025m","provider":"National HVAC Parts","version":"1.0","type":"link"}