{"product_id":"carrier-gb1aav036090aaja-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120V\/24V for GB1AAV036090AAJA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V\/24V for Model GB1AAV036090AAJA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part# HT01BC116) for the \u003cstrong\u003eCarrier GB1AAV036090AAJA\u003c\/strong\u003e gas furnace. The transformer steps down line voltage from 120V to the 24V AC signal that powers your thermostat, control board, gas valve, and all low-voltage control circuits. When the transformer fails, the entire control circuit goes dead — the thermostat goes blank, the furnace won't respond to any call for heat or cooling, and nothing in the system initializes. It's one of the most commonly overlooked failure points during a no-power diagnostic.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | OEM part number HT01BC116 | Factory-matched output for Carrier low-voltage control circuits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01BC116 transformer is wound to Carrier's exact VA and voltage tolerances, ensuring stable 24V output under full control circuit load. Undersized generic transformers can sag below 24V under load, causing erratic board behavior, nuisance lockouts, or premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the breaker and confirm voltage is zero with a multimeter before proceeding. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Note primary and secondary wire positions before disconnecting. Total job time is typically 20–30 minutes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. 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 as the direct OEM replacement for the Carrier \u003cstrong\u003eGB1AAV036090AAJA\u003c\/strong\u003e gas furnace. Confirm your existing transformer is rated 40VA 120V\/24V by checking the data label on the transformer body before ordering. If you're unsure of fitment, our parts team verifies compatibility before your order ships — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909426532723,"sku":"CARRIE-GB1AAV036090AAJA-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909426565491,"sku":"CARRIE-GB1AAV036090AAJA-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_a3bbb8cf-88e0-487f-8e39-659ed298d127.jpg?v=1782941366","url":"https:\/\/nationalhvacparts.com\/products\/carrier-gb1aav036090aaja-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}