{"product_id":"carrier-pg8jaa036045abja-transformer-h2usbz","title":"OEM Carrier 40VA Transformer 120V-24V for PG8JAA036045ABJA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer 120V–24V for Model PG8JAA036045ABJA\u003c\/h1\u003e\u003cp\u003eThis is the factory-specified OEM control circuit transformer for the \u003cstrong\u003eCarrier PG8JAA036045ABJA\u003c\/strong\u003e 80% AFUE gas furnace. The transformer steps down the 120V line voltage to the 24V AC required to power the thermostat, control board, gas valve, and all low-voltage components. When this transformer fails, the entire control circuit goes dead — you'll see a blank thermostat display, no response to any call for heat or cooling, and potentially a completely silent system with no error codes. This part ships under OEM part number \u003cstrong\u003eHT01BC116\u003c\/strong\u003e, now fulfilled as updated replacement \u003cstrong\u003eHT680054\u003c\/strong\u003e, and is a factory-authorized direct swap.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary input: 120V AC | Secondary output: 24V AC | 60Hz | Foot-mount configuration | Wire lead connections\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA tolerances, protecting downstream low-voltage components like the control board and gas valve from voltage fluctuation. Generic units often run under-rated, causing nuisance tripping, premature board failure, or repeated transformer burnout — especially when multiple 24V accessories (humidifiers, zoning) are on the same circuit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Always disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 0V before touching terminals). Photograph all wire connections before disconnecting. Match wire leads carefully: primary wires to line voltage, secondary wires to 24V control terminals. Note: if the replacement transformer fails again quickly, suspect a short in the 24V wiring before installing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered for the Carrier \u003cstrong\u003ePG8JAA036045ABJA\u003c\/strong\u003e 80% AFUE gas furnace and cross-compatible with multiple Bryant, Carrier, and Payne furnace models sharing the 40VA 120V\/24V transformer specification. Supersedes legacy part numbers HT01BC116, HT01BC115, HT01BB126, HT01BC120, and others. Verify your unit's data plate voltage requirements before ordering — our fitment team is available to confirm compatibility before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62643215860083,"sku":"CARRIE-PG8JAA036045ABJA-TRANSFORMER-HT01BC116","price":70.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62643215892851,"sku":"CARRIE-PG8JAA036045ABJA-TRANSFORMER-HT01BC116-GEN","price":62.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BC116_8309d5af-1b98-48c8-af44-8e2f15c835f0.jpg?v=1775016254","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pg8jaa036045abja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}