{"product_id":"carrier-ph3ppa048000aa-transformer-h3025m","title":"OEM Carrier Transformer 75VA 208\/240\/480-24V for PH3PPA048000AA","description":"\u003ch1\u003eOEM Carrier Control Transformer 75VA 208\/240\/480V to 24V for Model PH3PPA048000AA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part number \u003cstrong\u003eHT01BD242\u003c\/strong\u003e) is the factory-specified replacement control transformer for the \u003cstrong\u003eCarrier PH3PPA048000AA\u003c\/strong\u003e packaged heat pump unit. The transformer steps down high-voltage primary power — 208, 240, or 480 VAC — to the 24VAC signal used by the low-voltage control circuit. When this transformer fails, the entire control circuit loses power, rendering the thermostat unresponsive, preventing system startup, and potentially triggering a no-call-for-heat or no-call-for-cool fault condition. Common failure causes include electrical surges, short circuits in control wiring, and normal wear over time.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 75VA capacity | Primary: 208\/240\/480VAC | 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 factory OEM transformer is wound to Carrier's exact VA and voltage tolerance specifications. Undersized or off-tolerance aftermarket units can overheat under peak control load, trip thermal protection, or reduce the service life of connected components like contactors and control boards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Shut off all power to the unit and verify with a multimeter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, wire labels, and a multimeter. Photograph all wiring connections before disconnecting. Confirm primary voltage tap matches your supply voltage (208, 240, or 480V) before energizing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e Backed by Carrier's OEM parts warranty. Ships same business day from our warehouse when ordered before cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as the direct OEM replacement for the \u003cstrong\u003eCarrier PH3PPA048000AA\u003c\/strong\u003e packaged heat pump unit. Verify your unit's primary supply voltage and confirm part number HT01BD242 on your existing transformer's label before ordering. Our fitment team is available to verify compatibility before you buy — don't guess on a control transformer.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641344020851,"sku":"CARRIE-PH3PPA048000AA-TRANSFORMER-HT01BD242","price":70.2,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641344053619,"sku":"CARRIE-PH3PPA048000AA-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_2c8b5944-2c89-45a1-899f-2de22871c435.jpg?v=1782943202","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph3ppa048000aa-transformer-h3025m","provider":"National HVAC Parts","version":"1.0","type":"link"}