{"product_id":"carrier-fy5bnf030t08aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 120V\/24V for FY5BNF030T08AAAA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model FY5BNF030T08AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM control circuit transformer (part number \u003cstrong\u003eHT01CN241\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier FY5BNF030T08AAAA\u003c\/strong\u003e fan coil unit. The transformer steps line voltage down from 120V to 24V AC, powering the low-voltage control circuit that runs your thermostat, contactor coil, and control board. When this component fails, the entire control system goes dark — the thermostat becomes unresponsive, the system won't call for heating or cooling, and no fault codes appear because the board itself has no power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 120V primary | 24V secondary output | 40VA rated | OEM part number HT01CN241 | Factory-matched windings and insulation class\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances for the FY5BNF030T08AAAA control circuit. Undersized or off-spec generic units can overheat under load, trip thermal cutoffs, and damage downstream control boards — a far costlier repair.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and verify with a multimeter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring connections before removal. Mount securely and confirm no wire insulation contacts the transformer core.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. 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 Engineered as the direct OEM replacement for Carrier model \u003cstrong\u003eFY5BNF030T08AAAA\u003c\/strong\u003e fan coil units. Confirm your unit's data plate lists 120V primary \/ 24V secondary and 40VA rating before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you purchase — no guesswork, no return hassle.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909460709747,"sku":"CARRIE-FY5BNF030T08AAAA-TRANSFORMER-HT01CN241","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909460742515,"sku":"CARRIE-FY5BNF030T08AAAA-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_18361c1c-ec46-4497-817a-4c462ccbebb0.jpg?v=1782941274","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fy5bnf030t08aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}