{"product_id":"carrier-pf4mna030l00aaaa-transformer-h3hwwy","title":"OEM Carrier 40VA Transformer 208\/230V–24V for PF4MNA030L00AAAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer 208\/230V to 24V — HT01CN241 for Model PF4MNA030L00AAAA\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM replacement control transformer for the \u003cstrong\u003eCarrier PF4MNA030L00AAAA\u003c\/strong\u003e fan coil unit, identified by OEM part number \u003cstrong\u003eHT01CN241\u003c\/strong\u003e. The transformer steps down the 208\/230V line voltage to the 24V AC signal that powers your thermostat, control board, and all low-voltage switching components. When this transformer fails, the entire control circuit goes dead — the thermostat goes blank, the unit refuses to respond to any command, and the system locks out completely. A failed transformer is often misdiagnosed as a control board failure, making correct identification critical before replacing costlier components.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 208\/230V Primary | 24V Secondary | 40VA Power Rating | Basler Electric Model BE28316007 | Direct OEM drop-in replacement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier-sourced OEM transformer wound to exact VA and voltage tolerances. Aftermarket transformers often deviate in secondary voltage output under load, causing erratic low-voltage behavior and nuisance tripping of downstream boards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and breaker before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter (to verify 24V output after installation). Label all wires before disconnecting the old unit. Always verify output voltage after replacement before closing the cabinet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. In-stock units ship same business day when ordered before cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as the factory-specified transformer for the \u003cstrong\u003eCarrier PF4MNA030L00AAAA\u003c\/strong\u003e fan coil unit. Confirm your unit's line voltage (208V or 230V) matches the primary input before installing. If you have any fitment questions, our HVAC parts specialists verify compatibility before you order — ships fast from our stocked warehouse.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62643308855667,"sku":"CARRIE-PF4MNA030L00AAAA-TRANSFORMER-HT01CN241","price":108.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62643308888435,"sku":"CARRIE-PF4MNA030L00AAAA-TRANSFORMER-HT01CN241-GEN","price":95.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01CN241_d10c17dc-ece2-4618-a615-d7fdec925d31.jpg?v=1775016412","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pf4mna030l00aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}