{"product_id":"carrier-pg8maa048090aaja-transformer-h2usbz","title":"OEM Carrier Furnace Transformer 120V–24V 40VA for PG8MAA048090AAJA","description":"\u003ch1\u003eOEM Carrier Furnace Transformer 120V–24V 40VA for Model PG8MAA048090AAJA (Replaces HT01BC116)\u003c\/h1\u003e\u003cp\u003eThis OEM step-down transformer is the factory-specified replacement for the \u003cstrong\u003eCarrier PG8MAA048090AAJA\u003c\/strong\u003e gas furnace. The transformer converts \u003cstrong\u003e120V line voltage down to 24V AC\u003c\/strong\u003e, powering the entire low-voltage control circuit — including your thermostat, gas valve, inducer relay, and control board communication. When this transformer fails, nothing in the furnace responds: the thermostat calls for heat but the board receives no 24V signal, resulting in a completely dead furnace with no ignition attempt, no inducer start, and no error codes. A failed transformer is also frequently caused by a short elsewhere in the low-voltage wiring — always inspect the wiring harness before replacing.\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24V AC | VA Rating: 40VA | Frequency: 60 Hz | Phase: Single | Mounting Type: Foot-mount | Replaces OEM Part# HT01BC116 (superseded by HT680054)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact factory VA tolerances, ensuring stable 24V output under full control-circuit load. Generic transformers often run hotter and may sag voltage under peak demand, causing intermittent lockouts and premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the breaker and confirm zero voltage before touching any wiring. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (check C–R terminals for 24V after install). Photograph or label all wire connections before removing the old transformer. Before powering up, verify no low-voltage short exists (check for \u0026lt;1 ohm between R and C on the wiring harness).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. Ships same business day from our warehouse when ordered before 3 PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Fits Carrier model \u003cstrong\u003ePG8MAA048090AAJA\u003c\/strong\u003e gas furnace. This part supersedes OEM part number HT01BC116; the current shipping part number is HT680054. Both are the identical 120V–24V 40VA transformer — fully interchangeable. Verify your unit's data plate voltage before ordering. Need fitment confirmation? Our HVAC parts team checks compatibility before you buy — reach out before placing your order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62642986713459,"sku":"CARRIE-PG8MAA048090AAJA-TRANSFORMER-HT01BC116","price":50.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62642986746227,"sku":"CARRIE-PG8MAA048090AAJA-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_11b4113a-d0ae-45ee-b41a-4ba988e42b04.jpg?v=1775031586","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pg8maa048090aaja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}