{"product_id":"carrier-fa4bnf048000aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 120V\/24V for FA4BNF048000AAAA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model FA4BNF048000AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01CN241\u003c\/strong\u003e) is the factory-specified control circuit transformer for the \u003cstrong\u003eCarrier FA4BNF048000AAAA\u003c\/strong\u003e fan coil air handler. The transformer steps down 120V line voltage to the 24V signal voltage required to power the control board, thermostat, and all low-voltage control circuits. When this component fails, the entire control system goes dark — the thermostat loses power, the system refuses to respond to any commands, and no heating or cooling operation is possible. A failed transformer is often misdiagnosed as a bad control board, so always test this component first before replacing more expensive parts.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input: 120V AC | Output: 24V AC | VA Rating: 40VA | OEM Part Number: HT01CN241 | Factory-matched windings and core rating\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. Generic alternatives frequently run under-rated VA, causing nuisance trips and premature failure when multiple control accessories draw simultaneous load.\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, wire stripper, multimeter. Note wire colors and terminal positions before disconnecting leads. Confirm 24V output with a multimeter after installation before closing the panel.\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 Designed specifically for the Carrier \u003cstrong\u003eFA4BNF048000AAAA\u003c\/strong\u003e fan coil air handler. Verify your unit's data plate shows 120V primary control voltage before ordering. If you are unsure of fitment, our HVAC parts specialists can confirm compatibility before you purchase — no guesswork required. Order today for same-day shipping.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909553574259,"sku":"CARRIE-FA4BNF048000AAAA-TRANSFORMER-HT01CN241","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909553607027,"sku":"CARRIE-FA4BNF048000AAAA-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_7db7e69a-8025-4535-97ed-3f47ce6cbc60.jpg?v=1782940869","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fa4bnf048000aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}