{"product_id":"carrier-fa4anf018000agaa-transformer-h3hww2","title":"OEM Carrier Transformer 40VA 120\/24V for FA4ANF018000AGAA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model FA4ANF018000AGAA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part# \u003cstrong\u003eHT01CN236\u003c\/strong\u003e) is the factory-specified control circuit transformer for the \u003cstrong\u003eCarrier FA4ANF018000AGAA\u003c\/strong\u003e air handler. The transformer steps down 120V line voltage to 24V AC to power the control board, thermostat, and all low-voltage system controls. When the transformer fails, the entire control circuit goes dead — the thermostat goes blank, the system won't respond to calls for heating or cooling, and no fault codes are displayed. It is often the first component to suspect when the system appears completely unresponsive with no visible error codes.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01CN236 | Mounts directly to original bracket with no modification\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound to Carrier's exact VA and voltage tolerance specifications, ensuring stable 24V output under full load. Undersized or off-tolerance generic transformers can cause intermittent lockouts, nuisance tripping, 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 beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Test secondary output voltage after installation to confirm 24V before restoring full power. 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 and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the Carrier \u003cstrong\u003eFA4ANF018000AGAA\u003c\/strong\u003e air handler. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate before ordering to ensure an exact match. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909563011443,"sku":"CARRIE-FA4ANF018000AGAA-TRANSFORMER-HT01CN236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909563044211,"sku":"CARRIE-FA4ANF018000AGAA-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_4b9e24e9-a6f7-45b0-9886-32879bad9be7.jpg?v=1782938618","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fa4anf018000agaa-transformer-h3hww2","provider":"National HVAC Parts","version":"1.0","type":"link"}