{"product_id":"carrier-ph3gna024000ab-transformer-h3025m","title":"OEM Carrier Transformer 75VA 208\/240\/480V–24V for PH3GNA024000AB","description":"\u003ch1\u003eOEM Carrier Control Transformer 75VA 208\/240\/480V to 24VAC for Model PH3GNA024000AB\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM Carrier replacement transformer (part #HT01BD242) factory-specified for the \u003cstrong\u003eCarrier PH3GNA024000AB\u003c\/strong\u003e packaged heat pump unit. The control transformer steps down high-voltage line power to the 24VAC signal that energizes your thermostat, contactor coils, and all low-voltage control circuit components. When it fails, the entire control circuit loses power — the system will appear completely dead, with no response to thermostat calls for heating or cooling, no contactor pull-in, and no status LEDs on the control board.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 75VA power rating | Primary input: 208\/240\/480V multi-tap | Secondary output: 24VAC | Frequency: 50\/60Hz | Foot-mount configuration | OEM part #HT01BD242\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is the factory-original Carrier transformer, wound and insulated to exact VA and voltage tolerances. Generic substitutes often carry ±10% VA ratings, which can cause nuisance tripping of internal thermal protection under peak control-circuit load — especially with variable-speed or communicating systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Requires disconnecting line-voltage wiring at primary terminals. Always shut off power at the disconnect and verify with a non-contact voltage tester before touching any wiring. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label all low-voltage wiring before disconnecting secondary terminals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Ships same business day from our warehouse when ordered by 3PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Factory-matched for Carrier model \u003cstrong\u003ePH3GNA024000AB\u003c\/strong\u003e packaged heat pump units. The multi-tap primary (208\/240\/480V) makes this transformer suitable across multiple voltage configurations — confirm your unit's supply voltage on the data plate before connecting primary taps. Need fitment verification? Our HVAC parts specialists confirm compatibility before you order — no guesswork.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641392288115,"sku":"CARRIE-PH3GNA024000AB-TRANSFORMER-HT01BD242","price":70.2,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641392320883,"sku":"CARRIE-PH3GNA024000AB-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_b7d30b19-a108-4213-a834-71dea0d96979.jpg?v=1782943263","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph3gna024000ab-transformer-h3025m","provider":"National HVAC Parts","version":"1.0","type":"link"}