{"product_id":"carrier-pg8uaa036045acja-transformer-h2usbz","title":"OEM Carrier Furnace Transformer 120V–24V 40VA for PG8UAA036045ACJA","description":"\u003ch1\u003eOEM Carrier Furnace Control Transformer 120V–24V 40VA for Model PG8UAA036045ACJA\u003c\/h1\u003e\u003cp\u003eThis OEM step-down transformer is the factory-specified replacement for the \u003cstrong\u003eCarrier PG8UAA036045ACJA\u003c\/strong\u003e gas furnace. The transformer converts 120V line voltage down to 24V AC to power all low-voltage control-circuit components — including the thermostat, gas valve, inducer relay, and control board. When it fails, the entire low-voltage circuit goes dead: the thermostat goes blank, the furnace won't respond to any call for heat, and no LED fault codes will display because the board itself loses power. This part ships under OEM part number \u003cstrong\u003eHT01BC116\u003c\/strong\u003e, now fulfilled as the updated successor \u003cstrong\u003eHT680054\u003c\/strong\u003e — a factory-authorized direct replacement in a Carrier\/Bryant factory parts box.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Primary Voltage: 120V AC | Secondary Voltage: 24V AC | VA Rating: 40VA | Frequency: 50\/60 Hz | Phase: Single | Connection: Wire leads with insulated female quick-connects | Dimensions: 3\" L × 2-3\/16\" W × 2\" H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine OEM Carrier transformer built to factory tolerance. Generic transformers often lack the exact mounting footprint and rated VA capacity, leading to voltage sag under load — which causes erratic thermostat behavior, nuisance lockouts, and premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Turn off power at the breaker and confirm voltage is zero before proceeding. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wire connections before disconnecting. The transformer typically mounts with two screws on the furnace cabinet wall; wire leads connect via 1\/4\" insulated female quick-connects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. In-stock orders ship same business day from our warehouse when placed before the cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the \u003cstrong\u003eCarrier PG8UAA036045ACJA\u003c\/strong\u003e gas furnace. OEM part number HT01BC116 is superseded by HT680054 — both are covered by this listing. Also cross-references: HT01BC115, HT01BB126, HT01CT120, HT01BC120, HT01AW115, and several other legacy Carrier\/Bryant part numbers. Verify your unit's data plate voltage (120V primary) before ordering. Need a fitment check? Our team confirms compatibility before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62642806686067,"sku":"CARRIE-PG8UAA036045ACJA-TRANSFORMER-HT01BC116","price":51.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62642806751603,"sku":"CARRIE-PG8UAA036045ACJA-TRANSFORMER-HT01BC116-GEN","price":45.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BC116_918e78d6-0c27-4411-bb36-5805d035a632.jpg?v=1775031594","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pg8uaa036045acja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}