{"product_id":"carrier-ph1pnb024000aaaa-transformer-h3025m","title":"OEM Carrier Transformer 75VA 208\/240\/480V→24V for PH1PNB024000AAAA","description":"\u003ch1\u003eOEM Carrier 75VA Control Transformer HT01BD242 for Model PH1PNB024000AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier control transformer (part #HT01BD242) is the factory-specified replacement for the \u003cstrong\u003eCarrier PH1PNB024000AAAA\u003c\/strong\u003e packaged heat pump unit. The transformer steps down the high-voltage supply (208\/240\/480V primary) to the 24VAC signal required to power the entire low-voltage control circuit — including the thermostat, contactor coil, and safety switch inputs. When the transformer fails, the result is complete loss of control voltage: the thermostat goes blank, the system will not respond to any call for heating or cooling, and no contactors or relays will energize. Replacing a failed transformer is often the fastest, most cost-effective repair on any HVAC system.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 75VA power rating | Primary voltage: 208\/240\/480V | Secondary voltage: 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 a genuine Carrier OEM transformer wound to exact factory tolerances. Generic aftermarket transformers often carry ±10% VA tolerance, risking under-voltage conditions that cause nuisance control board lockouts and premature contactor coil failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Always shut off and lock out\/tag out power at the disconnect before servicing. Tools needed: multimeter (verify 0V before touching wires), flathead and Phillips screwdrivers, wire stripper, and needle-nose pliers. Confirm incoming line voltage matches transformer primary tap before energizing. Recommend verifying 24VAC output after install before closing the unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock units ship the same business day from our warehouse — order by 3 PM local time for same-day dispatch.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Factory-matched for Carrier model \u003cstrong\u003ePH1PNB024000AAAA\u003c\/strong\u003e packaged heat pump units. The HT01BD242 is also used across a wide range of Carrier, Bryant, Payne, ICP, Heil, Tempstar, and Comfortmaker equipment sharing the same 75VA, multi-tap primary control circuit. Always verify your unit's data plate voltage and VA requirements before ordering. Our parts specialists are available to confirm fitment before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641600856435,"sku":"CARRIE-PH1PNB024000AAAA-TRANSFORMER-HT01BD242","price":70.2,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641600889203,"sku":"CARRIE-PH1PNB024000AAAA-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_57455cca-2321-4d9c-a9a0-4a8cc07ec37e.jpg?v=1782943346","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph1pnb024000aaaa-transformer-h3025m","provider":"National HVAC Parts","version":"1.0","type":"link"}