{"product_id":"carrier-ph2ppb042000ab-transformer-h3025m","title":"OEM Carrier Transformer 75VA 208\/240\/480V–24V for PH2PPB042000AB","description":"\u003ch1\u003eOEM Carrier Transformer 75VA 208\/240\/480V to 24VAC for Model PH2PPB042000AB\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier control transformer (part #HT01BD242) is the factory-specified replacement for the \u003cstrong\u003eCarrier PH2PPB042000AB\u003c\/strong\u003e packaged heat pump unit. The transformer steps down high-voltage line power (208, 240, or 480V primary) to the 24VAC signal required to operate all low-voltage control circuit components — including the thermostat, contactor coil, reversing valve solenoid, and any safety controls. When this transformer fails, the entire control circuit goes dead: the thermostat goes blank, the system refuses to respond to any call for heating or cooling, and no safety board LEDs illuminate. In some cases, a failed transformer will trip its internal thermal fuse due to a downstream short, so always inspect low-voltage wiring for shorts before installing a replacement.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 75VA power rating | Primary input: 208\/240\/480V | 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 a genuine Carrier OEM transformer wound to exact factory VA and voltage tolerances. Generic aftermarket transformers often run underrated VA capacity, causing thermal overload on systems with higher-draw accessories like economizers or multiple zone valves.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Requires disconnecting line voltage (208–480V) at the disconnect box before any work begins. Tools needed: multimeter (to verify output 24VAC post-install and check for low-voltage shorts), screwdrivers, wire nuts or spade connectors. Confirm no wiring short exists on the 24V secondary circuit before energizing. Recommended for qualified HVAC technicians.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory 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 Engineered as a direct OEM replacement for \u003cstrong\u003eCarrier PH2PPB042000AB\u003c\/strong\u003e packaged heat pump units. The 75VA rating supports the full low-voltage control load of this platform. Verify your existing transformer's input voltage tap (208\/240\/480V) matches your building supply voltage before ordering. Have your model and serial number ready — our HVAC parts specialists are available to confirm fitment before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641448845683,"sku":"CARRIE-PH2PPB042000AB-TRANSFORMER-HT01BD242","price":70.2,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641448878451,"sku":"CARRIE-PH2PPB042000AB-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_093981f5-10de-484d-9fa7-5b1b44c7d500.jpg?v=1782943258","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph2ppb042000ab-transformer-h3025m","provider":"National HVAC Parts","version":"1.0","type":"link"}