{"product_id":"carrier-ph3gna048000ab-transformer-h3025m","title":"OEM Carrier 40VA Control Transformer HT01BD242 for PH3GNA048000AB","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD242 for Model PH3GNA048000AB\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part# \u003cstrong\u003eHT01BD242\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier PH3GNA048000AB\u003c\/strong\u003e packaged heat pump unit. The transformer steps down the 120V line voltage to the 24V signal required by your thermostat, control board, and all low-voltage switching circuits. When it fails, the entire control circuit goes dark — the thermostat loses power, the system stops responding to calls for heating or cooling, and you may find a blown fuse on the control board caused by a shorted secondary winding.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 120V primary input | 24V secondary output | 40VA rating | Direct OEM replacement for part# HT01BD242 | Factory-matched impedance and insulation class\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine OEM Carrier transformer wound to exact factory specification. Generic aftermarket transformers frequently underperform on VA capacity, leading to nuisance fuse failures and premature secondary winding burnout — especially in systems with multiple 24V accessories.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power to the unit before beginning. Tools needed: flathead and Phillips screwdrivers, 1\/4\" nut driver, multimeter. Verify 0V on both primary and secondary terminals before disconnecting. Label all wiring or photograph before removal. The transformer mounts to the control panel bracket with two screws; swap wire-for-wire on both primary and secondary terminals.\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.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the \u003cstrong\u003eCarrier PH3GNA048000AB\u003c\/strong\u003e packaged heat pump unit (4-ton, R-410A). Always confirm the VA rating and voltage on your unit's data plate before ordering. Not sure if this part fits your exact configuration? Our HVAC parts specialists verify fitment before you order — contact us anytime.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641373512051,"sku":"CARRIE-PH3GNA048000AB-TRANSFORMER-HT01BD242","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641373544819,"sku":"CARRIE-PH3GNA048000AB-TRANSFORMER-HT01BD242-GEN","price":30.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BD242_4b2be14d-1e46-46ee-9431-a0274a967cbe.jpg?v=1775016243","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph3gna048000ab-transformer-h3025m","provider":"National HVAC Parts","version":"1.0","type":"link"}