{"product_id":"carrier-pf4mna019t00abaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 208\/230V–24V for PF4MNA019T00ABAA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 208\/230V–24V for Model PF4MNA019T00ABAA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01CN241\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier PF4MNA019T00ABAA\u003c\/strong\u003e fan coil and air handler unit. The transformer steps down 208\/230V line voltage to the 24V AC signal that powers your thermostat, control board, relays, and zone controllers. When this transformer fails, the entire control circuit goes dead — your thermostat loses power, the system won't respond to calls for heating or cooling, and no diagnostic codes are generated because the board itself has no power. A failed transformer is a common misdiagnosis situation: always test transformer output voltage before condemning a control board.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 208\/230V Primary | 24V Secondary | 40VA Rating | Direct OEM drop-in replacement | Factory-matched impedance and thermal protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01CN241 is manufactured to Carrier's exact VA and impedance specifications, ensuring the control board and thermostat receive stable, clean 24V. Generic transformers may run hot, output off-voltage under load, or lack internal thermal fuses — risking damage to downstream boards and controls.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Label or photograph all wiring before disconnecting. Most installations take 20–30 minutes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. In-stock units ship same business day from our warehouse when ordered before cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered for the Carrier \u003cstrong\u003ePF4MNA019T00ABAA\u003c\/strong\u003e fan coil\/air handler. Always verify your unit's data plate voltage matches 208\/230V primary before ordering. Our parts specialists are available to confirm fitment — reach out before you order if you have any questions. In stock and ready to ship today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62643319538035,"sku":"CARRIE-PF4MNA019T00ABAA-TRANSFORMER-HT01CN241","price":108.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62643319570803,"sku":"CARRIE-PF4MNA019T00ABAA-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_a43a9c20-0597-460b-94cf-bf393ed44759.jpg?v=1775041550","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pf4mna019t00abaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}