{"product_id":"carrier-fx4anf042000abaa-transformer-h3hww2","title":"OEM Carrier Transformer 40VA 120V\/24V for FX4ANF042000ABAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01CN236 for Model FX4ANF042000ABAA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01CN236\u003c\/strong\u003e) is the factory-specified control transformer for the \u003cstrong\u003eCarrier FX4ANF042000ABAA\u003c\/strong\u003e fan coil air handler. Its job is to step down 120V line voltage to the 24V signal voltage that powers your thermostat, control board, and all low-voltage switching circuits. When this transformer fails, the entire control circuit goes dead — the thermostat displays nothing, the system will not respond to any calls for heating or cooling, and you may measure zero volts at the 24V secondary terminals. This is one of the most overlooked causes of a completely unresponsive HVAC system.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | Class 2 transformer | Hardwire mount | OEM part number HT01CN236 | Factory-matched output for stable low-voltage control circuits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This factory OEM transformer is wound to exact VA and voltage tolerances for the FX4ANF042000ABAA. Generic transformers frequently run underrated VA, causing thermal cutout trips and erratic low-voltage behavior — particularly under simultaneous thermostat and zone board loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label all low-voltage wires prior to removal. Verify 24V output with a multimeter after installation before restoring full system power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Ships same business day from our warehouse stock.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the Carrier \u003cstrong\u003eFX4ANF042000ABAA\u003c\/strong\u003e fan coil air handler. Confirm your existing transformer's VA rating and primary\/secondary voltages on the unit's data plate before ordering. Our parts specialists are available to verify fitment — order with confidence and get back up and running today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909488726387,"sku":"CARRIE-FX4ANF042000ABAA-TRANSFORMER-HT01CN236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909488759155,"sku":"CARRIE-FX4ANF042000ABAA-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_4d48a978-0516-490d-8ba0-9be0d1fbd069.jpg?v=1782941161","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fx4anf042000abaa-transformer-h3hww2","provider":"National HVAC Parts","version":"1.0","type":"link"}