{"product_id":"carrier-pg9maa048100afka-transformer-h2usbz","title":"OEM Carrier Furnace Transformer 120V-24V 40VA for PG9MAA048100AFKA","description":"\u003ch1\u003eOEM Carrier Furnace Transformer 120V–24V 40VA for Model PG9MAA048100AFKA (Part# HT01BC116 \/ HT680054)\u003c\/h1\u003e\u003cp\u003eThis is the OEM factory-specified step-down control transformer for the \u003cstrong\u003eCarrier PG9MAA048100AFKA\u003c\/strong\u003e gas furnace. The transformer converts 120V line voltage to the 24V AC signal that powers every low-voltage component in your system — thermostat, gas valve, inducer relay, and control board. When this transformer fails, the furnace goes completely silent: the thermostat shows no response, the board has no power, and nothing turns on. It is one of the most commonly overlooked root causes of a total no-heat call. OEM part number \u003cstrong\u003eHT01BC116\u003c\/strong\u003e has been superseded by the current factory-authorized replacement, \u003cstrong\u003eHT680054\u003c\/strong\u003e, which ships in a Carrier-branded box and is a direct drop-in swap.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Primary Voltage: 120 VAC | Secondary Voltage: 24 VAC | VA Rating: 40VA | Frequency: 50\/60 Hz | Phase: Single | Dimensions: 3\" L × 2-2\/16\" W × 2\" H | Foot-mount configuration | Wire lead connections\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound and tested to Carrier's exact VA and voltage-drop tolerances. Generic transformers often run high secondary voltage at light load, which can damage sensitive control boards and shorten thermostat life. OEM is always the correct choice for PG9MAA-series furnaces.\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 screwdriver, 1\/4\" nut driver, multimeter. Always label or photograph all wire connections before removal. Verify 24V output across R and C terminals after installation to confirm function before closing the cabinet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer's warranty. In-stock and ships same business day when ordered by cutoff time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003ePG9MAA048100AFKA\u003c\/strong\u003e gas furnace. Also replaces legacy part numbers HT01BC115, HT01BB126, HT01CT120, HT01BC120, HT01AW115, HT01AA012, HT01AQ110, HT01CT210, 322666-701, 322953-302, and B1810113 across Carrier, Bryant, and Payne furnace platforms. Always confirm primary\/secondary voltage and VA rating on your unit's data plate before ordering. Need fitment verification? Our HVAC parts team confirms compatibility before you buy — reach out before placing your order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62642321981811,"sku":"CARRIE-PG9MAA048100AFKA-TRANSFORMER-HT01BC116","price":51.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62642322014579,"sku":"CARRIE-PG9MAA048100AFKA-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_70d27794-0827-4ae2-af86-f04584f23efd.jpg?v=1775031458","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pg9maa048100afka-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}