{"product_id":"carrier-fb4anf042008afaa-transformer-h3hww2","title":"OEM Carrier Transformer 40VA 120V-24V for FB4ANF042008AFAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01CN236 for Model FB4ANF042008AFAA\u003c\/h1\u003e\u003cp\u003eThis is the OEM factory-specified control transformer (part number \u003cstrong\u003eHT01CN236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier FB4ANF042008AFAA\u003c\/strong\u003e fan coil air handler. The transformer steps down 120V line voltage to the 24V AC signal required to power the control board, thermostat, and all low-voltage control circuits. When this transformer fails, the entire control circuit goes dark — the thermostat shows no power, the system will not respond to any calls for heating or cooling, and the air handler appears completely dead even with line voltage present.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | OEM part number HT01CN236 | Factory-matched output for Carrier low-voltage control circuits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA ratings and insulation class required by Carrier. Undersized or off-tolerance generic units can overheat under control board load, blow the secondary fuse, or cause erratic thermostat behavior.\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, needle-nose pliers, multimeter. Test secondary output (should read 24–28V AC) before buttoning up the air handler cabinet. Label or photograph all wiring connections prior to removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock units ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as a direct OEM replacement for the Carrier \u003cstrong\u003eFB4ANF042008AFAA\u003c\/strong\u003e fan coil air handler. Verify your existing transformer's VA rating and primary\/secondary voltage on the unit's data plate or wiring diagram before ordering. Our parts specialists are available to confirm fitment prior to purchase — same-day shipping on all in-stock orders.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909543416179,"sku":"CARRIE-FB4ANF042008AFAA-TRANSFORMER-HT01CN236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909543448947,"sku":"CARRIE-FB4ANF042008AFAA-TRANSFORMER-HT01CN236-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-HT01CN236_9fb6985b-de76-4283-aff9-e0b4651508d1.jpg?v=1782939492","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fb4anf042008afaa-transformer-h3hww2","provider":"National HVAC Parts","version":"1.0","type":"link"}