{"product_id":"carrier-ph1pnb036000aaaa-transformer-h3025m","title":"OEM Carrier 75VA Transformer 208\/240\/480V–24V for PH1PNB036000AAAA","description":"\u003ch1\u003eOEM Carrier 75VA Control Transformer HT01BD242 for Model PH1PNB036000AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part #HT01BD242) is the factory-specified replacement for the \u003cstrong\u003eCarrier PH1PNB036000AAAA\u003c\/strong\u003e heat pump package unit. The transformer steps down high-voltage line power (208\/240\/480V) to the 24VAC signal voltage that powers your thermostat, contactor coil, control board, and every other low-voltage component in the system. When it fails, nothing works — the thermostat goes blank, the system won't respond to any call for heating or cooling, and you may blow a 3A control fuse repeatedly. A failed transformer is often misdiagnosed as a control board or thermostat problem, so always confirm 24VAC output at the secondary terminals before replacing other components.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 75VA power rating | Primary input: 208\/240\/480VAC, 50\/60Hz | Secondary output: 24VAC | Foot-mount configuration | OEM part #HT01BD242\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is the genuine Carrier OEM unit, engineered to exact 75VA capacity and insulation class. Generic transformers often run undersized VA ratings, causing thermal overload and premature failure — especially on systems with multiple 24V accessories.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — De-energize the unit at the disconnect and breaker before beginning. Tools needed: multimeter, flathead and Phillips screwdrivers, wire stripper. Always confirm 24VAC output after installation before closing the panel. If fuses continue to blow, trace for a short in the low-voltage wiring loop.\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 by cutoff time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as the direct OEM replacement for the \u003cstrong\u003eCarrier PH1PNB036000AAAA\u003c\/strong\u003e packaged heat pump unit. The multi-tap primary (208\/240\/480V) makes this transformer suitable across varied commercial and residential supply voltages. Verify your unit's data plate voltage configuration before wiring. Have a fitment question? Our HVAC parts specialists confirm compatibility before you order — contact us today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641591124339,"sku":"CARRIE-PH1PNB036000AAAA-TRANSFORMER-HT01BD242","price":108.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641591157107,"sku":"CARRIE-PH1PNB036000AAAA-TRANSFORMER-HT01BD242-GEN","price":95.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BD242.jpg?v=1775016750","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph1pnb036000aaaa-transformer-h3025m","provider":"National HVAC Parts","version":"1.0","type":"link"}