{"product_id":"carrier-ph3gna048000aa-transformer-h3025m","title":"OEM Carrier Transformer 75VA 208\/240\/480V–24V for PH3GNA048000AA","description":"\u003ch1\u003eOEM Carrier Control Transformer 75VA 208\/240\/480V to 24V — HT01BD242 for Model PH3GNA048000AA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part# \u003cstrong\u003eHT01BD242\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier PH3GNA048000AA\u003c\/strong\u003e packaged unit. The transformer steps down high-voltage primary power — 208V, 240V, or 480V — to the 24V AC signal that powers your entire control circuit: thermostat, contactor coil, gas valve, and safety switches. When this transformer fails, the system goes completely unresponsive — no thermostat communication, no staging, nothing. It is one of the first components to check when a unit shows zero control activity despite line voltage being present at the unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 75VA rating | Primary: 208\/240\/480V | Secondary: 24VAC | 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. Undersized or off-tolerance generic transformers can sag under load, causing intermittent lockouts and premature contactor coil failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Requires de-energizing the unit at the disconnect and verifying zero voltage with a multimeter before touching any wiring. Tools needed: multimeter, flathead and Phillips screwdrivers, needle-nose pliers, wire nuts or spade terminals. Label all wires before removal. Verify primary voltage tap matches your supply voltage before energizing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory 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 PH3GNA048000AA\u003c\/strong\u003e packaged unit. Also cross-references across Carrier, Bryant, Payne, Tempstar, and Heil systems using the HT01BD242 specification. Always confirm primary voltage (208V, 240V, or 480V) on your unit's data plate before ordering. Our fitment team is available to verify compatibility before you buy — just reach out.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641376985459,"sku":"CARRIE-PH3GNA048000AA-TRANSFORMER-HT01BD242","price":70.2,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641377018227,"sku":"CARRIE-PH3GNA048000AA-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_00ca1a7f-9226-4f0d-bb66-fb1f51cdb754.jpg?v=1782943270","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph3gna048000aa-transformer-h3025m","provider":"National HVAC Parts","version":"1.0","type":"link"}