{"product_id":"carrier-fy4anf024000aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 120V\/24V for FY4ANF024000AAAA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V to 24V for Model FY4ANF024000AAAA\u003c\/h1\u003e\u003cp\u003eThis is the OEM factory-replacement control transformer (part number \u003cstrong\u003eHT01CN241\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier FY4ANF024000AAAA\u003c\/strong\u003e fan coil unit. The transformer steps down 120V line voltage to the 24V AC signal required to power your thermostat, control board, and all low-voltage system components. When this transformer fails, the entire control circuit goes dark — your thermostat will appear dead, the system will not respond to any calls for heating or cooling, and no error codes will display because the board itself has no power to report them.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Class 2 control transformer | Factory OEM part number HT01CN241 | Direct plug-and-play replacement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01CN241 is wound to exact factory VA ratings and insulation class, ensuring reliable 24V output under full system load. Generic transformers are frequently undersized in practice, causing voltage sag that triggers nuisance lockouts and premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker before starting. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or quick-connect terminals. Confirm 120V input is absent with your meter before touching any wiring. Note wire colors and terminal labels before disconnecting the old unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. 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 Designed specifically for the Carrier \u003cstrong\u003eFY4ANF024000AAAA\u003c\/strong\u003e fan coil unit. Verify your unit's data plate shows a 120V\/24V 40VA transformer requirement before ordering. If you are unsure of fitment, our parts specialists are available to confirm compatibility before you purchase — same-day shipping means there's no reason to wait.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909468737907,"sku":"CARRIE-FY4ANF024000AAAA-TRANSFORMER-HT01CN241","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909468770675,"sku":"CARRIE-FY4ANF024000AAAA-TRANSFORMER-HT01CN241-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-HT01CN241_5ef12ef9-985a-420b-a20b-c3c2f5da5e21.jpg?v=1782941256","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fy4anf024000aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}