{"product_id":"carrier-pg8maa048090acja-transformer-h2usbz","title":"OEM Carrier Furnace Transformer 120V–24V 40VA — PG8MAA048090ACJA","description":"\u003ch1\u003eOEM Carrier Furnace Transformer 120V–24V 40VA for Model PG8MAA048090ACJA\u003c\/h1\u003e\u003cp\u003eThis OEM step-down transformer is the factory-specified control circuit component for the \u003cstrong\u003eCarrier PG8MAA048090ACJA\u003c\/strong\u003e gas furnace. It converts 120V line voltage down to 24V AC to power the low-voltage control board, thermostat circuit, and all associated safety controls. When the transformer fails, the entire control circuit goes dark — you'll have a completely unresponsive furnace with no thermostat communication, no inducer startup, and no ignition attempt whatsoever. A failed transformer is also commonly caused by a shorted low-voltage wire or failed component elsewhere in the circuit, so always inspect for downstream shorts before installing the replacement.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Primary Input: 120V AC | Secondary Output: 24V AC | VA Rating: 40VA | Frequency: 60 Hz | Mounting Type: Foot mount | Connection: Wire leads with insulated connectors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is an OEM Carrier-authorized transformer built to exact factory VA and voltage output tolerances. Generic transformers frequently exhibit voltage sag under load and improper mounting footprints — one customer noted a generic unit would not mount correctly without modification. OEM ensures a true drop-in fit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the breaker and verify voltage is absent before disconnecting any wires. Photograph all wire connections before removal. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output post-install). Note: always check for low-voltage shorts before powering up the new transformer to prevent immediate failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the \u003cstrong\u003eCarrier PG8MAA048090ACJA\u003c\/strong\u003e gas furnace. OEM part number HT01BC116 has been superseded by updated part number \u003cstrong\u003eHT680054\u003c\/strong\u003e — both are covered by this listing and ship as the current OEM revision. Cross-references include HT01BC115, HT01BC116B, HT01BB126, and HT01CT120. Verify your unit's primary voltage (120V) on the data plate before ordering. Questions about fitment? Our team confirms compatibility before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62642975211891,"sku":"CARRIE-PG8MAA048090ACJA-TRANSFORMER-HT01BC116","price":50.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62642975244659,"sku":"CARRIE-PG8MAA048090ACJA-TRANSFORMER-HT01BC116-GEN","price":44.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BC116_fe2ea0a5-086e-4825-972d-d6e6c24cc67f.jpg?v=1775031630","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pg8maa048090acja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}