{"product_id":"carrier-pg8maa066135adja-transformer-h2usbz","title":"OEM Carrier 40VA Transformer 120V-24V HT01BC116 — PG8MAA066135ADJA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer 120V–24V for Model PG8MAA066135ADJA (HT01BC116)\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier control transformer is the factory-specified replacement for the \u003cstrong\u003eCarrier PG8MAA066135ADJA\u003c\/strong\u003e gas furnace. The transformer steps down 120V line voltage to the 24V AC signal required to power the thermostat circuit, gas valve, contactor coil, and all low-voltage controls throughout the system. When this transformer fails, \u003cstrong\u003enothing works\u003c\/strong\u003e — the thermostat goes blank, the furnace won't fire, and the entire control circuit goes dead. It is one of the first components to check when a furnace has completely stopped responding.\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| 120V AC primary input | 24V AC secondary output | 60 Hz | Foot-mount configuration | OEM part number HT01BC116 (superseded by HT680054)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage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. Undersized or off-spec generic transformers can sag under full load, causing intermittent lockouts, nuisance tripped fuses, and premature failure of the gas valve or control board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the breaker before starting. Photograph all wiring connections before disconnecting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Always check for a shorted low-voltage wire before replacing — a short is the most common cause of transformer burnout.\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 Designed for the Carrier \u003cstrong\u003ePG8MAA066135ADJA\u003c\/strong\u003e gas furnace. Also supersedes part numbers HT01BC115, HT01BB126, HT01CT120, HT01BC120, HT01AW115, and HT01AA012. Verify your unit's data plate lists a 40VA \/ 120–24V transformer specification before ordering. Need help confirming fitment? Our HVAC parts team verifies compatibility before you order — contact us today and ship the same day.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62642859901299,"sku":"CARRIE-PG8MAA066135ADJA-TRANSFORMER-HT01BC116","price":60.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62642859934067,"sku":"CARRIE-PG8MAA066135ADJA-TRANSFORMER-HT01BC116-GEN","price":52.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BC116_0a14b54b-b638-49ad-b591-7cc511779b47.jpg?v=1775016317","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pg8maa066135adja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}