{"product_id":"carrier-ph2pnb030000ab-transformer-h3025m","title":"OEM Carrier Transformer 75VA 208\/240\/480V–24V for PH2PNB030000AB","description":"\u003ch1\u003eOEM Carrier Control Transformer 75VA 208\/240\/480V to 24VAC for Model PH2PNB030000AB\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part #HT01BD242) is the factory-specified replacement for the \u003cstrong\u003eCarrier PH2PNB030000AB\u003c\/strong\u003e packaged heat pump and rooftop unit. The transformer steps down high-voltage line power (208\/240\/480V) to the 24VAC signal required by thermostats, control boards, contactors, and every other low-voltage component in the control circuit. When this transformer fails, the entire control circuit goes dark — the thermostat loses power, nothing responds to a call for heating or cooling, and the unit appears completely dead despite line voltage being present at the unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 75VA power rating | Input: 208\/240\/480V, 50\/60Hz | Output: 24VAC | 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 VA and voltage tolerances. Undersized or off-spec generic transformers can overheat under peak control-circuit load, blow the internal fuse, and damage downstream boards — making OEM the only reliable long-term choice.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Disconnect and lock out all power before proceeding. Tools needed: multimeter (verify 0V before touching wires), flathead and Phillips screwdrivers, wire nuts or terminal connectors. Photograph all wiring connections before removal. Verify 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 1-year OEM manufacturer warranty. In-stock units ship 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 for the \u003cstrong\u003eCarrier PH2PNB030000AB\u003c\/strong\u003e packaged rooftop\/heat pump unit. This transformer is also used across multiple Carrier, Bryant, and Payne platforms — verify your unit's supply voltage and confirm the HT01BD242 part number on your existing transformer's label before ordering. Not sure it fits? Our HVAC parts team verifies fitment before you buy — contact us today and ship with confidence.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641457922419,"sku":"CARRIE-PH2PNB030000AB-TRANSFORMER-HT01BD242","price":70.2,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641457955187,"sku":"CARRIE-PH2PNB030000AB-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_92012fd1-5ef5-4879-a565-7a78e2edd533.jpg?v=1782943250","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph2pnb030000ab-transformer-h3025m","provider":"National HVAC Parts","version":"1.0","type":"link"}