{"product_id":"carrier-fpaa100d34cn-transformer-h2usbz","title":"OEM Carrier Transformer 40VA 120V\/24V for FPAA100D34CN — HT01BC116","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V–24V for Model FPAA100D34CN\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BC116\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier FPAA100D34CN\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 120V to 24V AC to power the entire low-voltage control circuit — including your thermostat, contactor coil, gas valve, and control board. When the transformer fails, nothing in the system responds: the thermostat goes dark, the unit won't start, and you may measure zero voltage on the 24V secondary terminals. A blown transformer is often caused by a short in the low-voltage wiring, so always inspect control wiring before installing the replacement.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01BC116 | Factory-matched terminals for direct drop-in installation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit is wound to exact factory VA and voltage specifications. Undersized or off-tolerance generic transformers overheat under normal control-circuit load, leading to repeat failures and potential control board damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or quick-connect terminals. Test secondary voltage output after installation before re-energizing the full system. Always check for downstream short circuits first.\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 Direct OEM replacement for Carrier model \u003cstrong\u003eFPAA100D34CN\u003c\/strong\u003e. Verify your existing transformer's primary\/secondary voltage and VA rating on its label before ordering to confirm fitment. Our team is available to verify compatibility before you purchase — reach out anytime.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909498655091,"sku":"CARRIE-FPAA100D34CN-TRANSFORMER-HT01BC116","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909498687859,"sku":"CARRIE-FPAA100D34CN-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_2d1e88f9-a41b-4d0e-87b0-5f3baa58476c.jpg?v=1782941096","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fpaa100d34cn-transformer-h2usbz","provider":"National HVAC Parts","version":"1.0","type":"link"}