{"product_id":"carrier-ga1aad048085abja-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120\/24V for GA1AAD048085ABJA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model GA1AAD048085ABJA\u003c\/h1\u003e\u003cp\u003eThis is the OEM factory-specified control circuit transformer (part# \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier GA1AAD048085ABJA\u003c\/strong\u003e packaged unit. The transformer steps down line voltage (120V) to the 24V AC signal that powers your thermostat, contactor coil, gas valve, and control board. When this component fails, the entire control circuit goes dead — the thermostat displays nothing, the system won't respond to any call for heating or cooling, and you may blow a control fuse repeatedly. It is one of the first components to check when a system shows absolutely no response.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V | Secondary: 24V | Class 2 low-voltage output | Direct OEM replacement for part number HT01BC116\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 tolerances. Undersized or off-tolerance aftermarket transformers can sag under load, causing erratic contactor chatter, nuisance lockouts, and premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdriver, needle-nose pliers, multimeter (to verify 24V output after installation). Label or photograph all low-voltage wiring before disconnecting from the secondary terminals.\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 \u003cstrong\u003eCarrier GA1AAD048085ABJA\u003c\/strong\u003e packaged gas\/electric unit. Always verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or wiring diagram before ordering. Our parts specialists are available to confirm fitment prior to purchase — reach out before you order if you have any questions.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909451370867,"sku":"CARRIE-GA1AAD048085ABJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909451403635,"sku":"CARRIE-GA1AAD048085ABJA-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_e34e1b40-5f26-4f62-8ba6-d08fda89ed3b.jpg?v=1782938688","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ga1aad048085abja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}