{"product_id":"carrier-ph4gexa48000aa-transformer-h2uxan","title":"OEM Carrier Transformer 40VA 24V for PH4GEXA48000AA — HT01BC701","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA for Model PH4GEXA48000AA — Part # HT01BC701\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier control transformer (part number \u003cstrong\u003eHT01BC701\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier PH4GEXA48000AA\u003c\/strong\u003e packaged heat pump unit. The transformer steps down line voltage (120V) to the 24V signal used by your thermostat, control board, contactor coil, and all low-voltage safety circuits. When it fails, absolutely nothing in the system responds — no fan, no compressor, no thermostat communication — making it one of the first components to check in a complete system no-response call.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V | Secondary: 24V | Single-phase | Designed to OEM factory tolerances for the PH4GEXA48000AA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers like this HT01BC701 are wound to exact VA and voltage specifications. Undersized or off-tolerance generic units can overheat, trip internal fuses, and damage connected control boards — a costly secondary failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and breaker before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Always verify 24V output with a meter before powering the full system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders placed before cutoff ship the same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Verified fit for Carrier model \u003cstrong\u003ePH4GEXA48000AA\u003c\/strong\u003e packaged heat pump units. Cross-reference your unit's data plate and existing transformer VA\/voltage ratings before ordering. Our fitment team is available to confirm compatibility before you buy — ships fast so your system is back online today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641236836723,"sku":"CARRIE-PH4GEXA48000AA-TRANSFORMER-HT01BC701","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641236869491,"sku":"CARRIE-PH4GEXA48000AA-TRANSFORMER-HT01BC701-GEN","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-HT01BC701_89d4f85f-de1f-4cfb-8086-bec525b0612e.jpg?v=1782942669","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph4gexa48000aa-transformer-h2uxan","provider":"National HVAC Parts","version":"1.0","type":"link"}