{"product_id":"carrier-fh4cnf002000aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 120V\/24V for FH4CNF002000AAAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01CN241 for Model FH4CNF002000AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01CN241\u003c\/strong\u003e) is the factory-specified control transformer for the \u003cstrong\u003eCarrier FH4CNF002000AAAA\u003c\/strong\u003e fan coil air handler. The transformer steps down 120V line voltage to the 24V signal voltage required by the thermostat, control board, contactor coil, and all low-voltage safety circuits. When this component fails, the entire control circuit goes dark — the thermostat loses communication, the system will not respond to calls for heating or cooling, and no components will energize. A failed transformer is often mistaken for a bad thermostat or control board, making correct diagnosis critical before replacement.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120VAC | Secondary: 24VAC | OEM part number HT01CN241 | Direct factory replacement with matched impedance and thermal protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound to Carrier's exact VA rating and thermal cutout spec. Generic transformers frequently underperform at full load, causing nuisance trips, brownouts in the 24V circuit, and premature failure of downstream components like contactors and control boards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and verify zero voltage with a multimeter before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire stripper. Label all low-voltage wiring before disconnecting and confirm primary and secondary leads are correctly terminated to avoid immediate burnout.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. Orders placed before cutoff ship same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the Carrier \u003cstrong\u003eFH4CNF002000AAAA\u003c\/strong\u003e fan coil air handler. Always verify the VA rating and primary\/secondary voltages on your unit's data plate before ordering to ensure proper fitment. Our HVAC parts specialists are available to confirm compatibility before you purchase — same-day shipping available on all in-stock OEM transformers.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909511663987,"sku":"CARRIE-FH4CNF002000AAAA-TRANSFORMER-HT01CN241","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909511696755,"sku":"CARRIE-FH4CNF002000AAAA-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_da2a7920-4e57-4e16-8753-5b6b15d90a08.jpg?v=1782941012","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fh4cnf002000aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}