{"product_id":"carrier-pg8jaa048070aaja-transformer-h2usbz","title":"OEM Carrier 40VA Transformer 120V-24V for PG8JAA048070AAJA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer 120V–24V for Model PG8JAA048070AAJA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier control transformer is the factory-specified replacement for the \u003cstrong\u003eCarrier PG8JAA048070AAJA\u003c\/strong\u003e gas furnace. The transformer steps down 120V AC line voltage to the 24V AC signal required to power the thermostat, control board, gas valve, and all low-voltage safety circuits. When it fails, the entire low-voltage control circuit goes dead — the thermostat goes blank, the system refuses to call for heat, and no fault codes are displayed because there is no power to display them. A failed transformer is a common and often misdiagnosed cause of a completely unresponsive furnace.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V AC primary input | 24V AC secondary output | 60 Hz | Foot-mount configuration | Wire lead connections | Part# HT01BC116 (superseded by HT680054)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances required by the Carrier control board. Undersized or out-of-tolerance generic transformers can overdraw current, trip thermal fuses, or cause erratic control board behavior — often leading to a second unnecessary repair call.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Always shut off power at the breaker and gas supply before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 0V before touching wiring). Photograph all wire connections before disconnecting. The transformer mounts via a foot bracket and connects via wire leads — a straightforward swap for any experienced DIYer or technician.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty on parts. 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 Engineered as a direct OEM replacement for \u003cstrong\u003eCarrier model PG8JAA048070AAJA\u003c\/strong\u003e gas furnaces. Note that OEM part number HT01BC116 has been superseded by updated part number HT680054 — both are the same specification and either number is acceptable for ordering. Cross-references include HT01BC115, HT01BC116B, HT01BC120, HT01BB126, and HT680054. Verify your unit's data plate voltage requirements before ordering. Questions about fitment? Our HVAC parts specialists verify compatibility before you order — no guesswork.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62643204424051,"sku":"CARRIE-PG8JAA048070AAJA-TRANSFORMER-HT01BC116","price":60.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62643204456819,"sku":"CARRIE-PG8JAA048070AAJA-TRANSFORMER-HT01BC116-GEN","price":53.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BC116_2865dddd-69fb-4b61-af57-f1664bd04fcc.jpg?v=1775016257","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pg8jaa048070aaja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}