{"product_id":"carrier-fa4anc018008agaa-transformer-h3hww2","title":"OEM Carrier Transformer 40VA 120V\/24V for FA4ANC018008AGAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01CN236 for Model FA4ANC018008AGAA\u003c\/h1\u003e\u003cp\u003eThis is the OEM factory-specified control circuit transformer (part number \u003cstrong\u003eHT01CN236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier FA4ANC018008AGAA\u003c\/strong\u003e fan coil air handler. The transformer steps down 120V line voltage to the 24V signal voltage that powers your thermostat, control board, and all low-voltage switching circuits. When it fails, absolutely nothing works — the thermostat goes blank, no heating or cooling stages respond, and the system appears completely dead. A failed transformer is one of the most commonly misdiagnosed HVAC faults; always verify 24V output across the secondary terminals with a multimeter before replacing more expensive components like the control board.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary input | 24V secondary output | OEM part number HT01CN236 | Factory-matched to Carrier FA4ANC018008AGAA control circuit requirements\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA capacity and insulation class for your unit. Undersized or off-spec generic units can overheat, trip thermal fuses, and damage downstream control boards — making the OEM part a sound investment on a low-cost component.\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, wire nuts or quick-connect terminals. Label all low-voltage wires (R, C, G, Y, W) before disconnecting the old unit. Confirm 24V output on secondary before reassembling the cabinet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before 3 PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed and factory-spec'd for the Carrier \u003cstrong\u003eFA4ANC018008AGAA\u003c\/strong\u003e fan coil air handler. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate before ordering. If you are unsure of fitment, our HVAC parts specialists are available to confirm compatibility before you purchase — just reach out with your full model and serial number.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909569859955,"sku":"CARRIE-FA4ANC018008AGAA-TRANSFORMER-HT01CN236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909569892723,"sku":"CARRIE-FA4ANC018008AGAA-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_70d56494-3655-4a94-9c77-a87d12baec5e.jpg?v=1782940804","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fa4anc018008agaa-transformer-h3hww2","provider":"National HVAC Parts","version":"1.0","type":"link"}