{"product_id":"carrier-pf4mnb019t00aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 208\/230V–24V for PF4MNB019T00AAAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01CN241 for Model PF4MNB019T00AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part number \u003cstrong\u003eHT01CN241\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier PF4MNB019T00AAAA\u003c\/strong\u003e fan coil \/ air handler unit. The transformer steps down line voltage from \u003cstrong\u003e208\/230V primary\u003c\/strong\u003e to a safe \u003cstrong\u003e24V secondary\u003c\/strong\u003e signal used by the thermostat, control board, and all low-voltage control circuits. When this transformer fails, the entire control circuit goes dead — your thermostat will appear unresponsive, and the system will not heat or cool at all. It is often the first component to diagnose when a system produces zero response despite correct thermostat settings.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 208\/230V Primary | 24V Secondary | 40VA power rating | Direct OEM drop-in replacement for Carrier PF4MNB019T00AAAA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier Factory Authorized Part, built to exact OEM voltage and VA tolerances. Generic transformers may be under-rated for VA load, causing premature burnout or nuisance tripping of the internal thermal fuse — a common callback failure point.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label or photograph all low-voltage wiring before disconnecting. The transformer typically mounts to the blower compartment panel with two screws and uses spade or screw-terminal connections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse when ordered by 3 PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as a direct OEM replacement for Carrier model \u003cstrong\u003ePF4MNB019T00AAAA\u003c\/strong\u003e. Always verify your unit's data plate voltage and VA requirements before ordering. Not sure it fits? Our HVAC parts specialists are available to confirm fitment before you order — contact us today and get your system back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62643271532915,"sku":"CARRIE-PF4MNB019T00AAAA-TRANSFORMER-HT01CN241","price":108.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62643271565683,"sku":"CARRIE-PF4MNB019T00AAAA-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_2f07222e-063e-4af2-838a-9cd139502233.jpg?v=1775041604","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pf4mnb019t00aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}