{"product_id":"carrier-ga1aad060100aaja-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120V\/24V for GA1AAD060100AAJA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model GA1AAD060100AAJA\u003c\/h1\u003e\u003cp\u003eThis OEM control circuit transformer (part# \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier GA1AAD060100AAJA\u003c\/strong\u003e packaged gas\/electric unit. The transformer steps down 120V line voltage to 24V to power the entire low-voltage control circuit — including the thermostat, contactor coil, gas valve, and control board. When it fails, nothing in the system responds: the thermostat goes dark, the unit won't call for heat or cooling, and you may find a blown 3A fuse on the control board as a secondary symptom.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | Class 2 transformer | OEM part number HT01BC116 | Factory-matched impedance and thermal protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01BC116 transformer is wound to exact factory VA and voltage specifications. Undersized or off-tolerance aftermarket units can overheat under normal load, blow fuses repeatedly, or deliver insufficient voltage to reliably open gas valves and contactors — shortening downstream component life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and verify zero voltage before touching any wiring. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Photograph all low-voltage wiring before disconnecting. Confirm the new transformer secondary reads 24–28V AC before buttoning up the unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the \u003cstrong\u003eCarrier GA1AAD060100AAJA\u003c\/strong\u003e 5-ton packaged unit. Cross-reference part number HT01BC116 against your unit's wiring diagram label before ordering to confirm correct VA rating. Not sure it fits? Our HVAC parts specialists verify fitment at no charge — contact us before you order and we'll confirm.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909449109875,"sku":"CARRIE-GA1AAD060100AAJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909449142643,"sku":"CARRIE-GA1AAD060100AAJA-TRANSFORMER-HT01BC116-GEN","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-HT01BC116_053ba710-4c95-4028-bada-69e3677159e5.jpg?v=1782941321","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ga1aad060100aaja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}