{"product_id":"carrier-pf4mnb025t00abaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 208\/230V–24V for PF4MNB025T00ABAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer 208\/230V–24V for Model PF4MNB025T00ABAA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part #HT01CN241) is the factory-specified 40VA step-down transformer for the \u003cstrong\u003eCarrier PF4MNB025T00ABAA\u003c\/strong\u003e fan coil and air handler. The transformer converts 208\/230V line voltage down to the 24V AC used by the entire control circuit — including the thermostat, contactor coil, and control board. When the transformer fails, the result is complete control loss: the thermostat goes dark, the system won't respond to any call for heating or cooling, and in some cases a tripped or blown fuse on the secondary side is the first clue. Replacing with a genuine OEM unit is the fastest path back to normal operation.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 208\/230V primary | 24V AC secondary | Direct OEM replacement for part #HT01CN241 | Class 2 control transformer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e Genuine Carrier OEM transformers are wound to exact VA and voltage tolerances. Undersized or off-spec generic transformers overheat under normal HVAC control loads, blowing secondary fuses and shortening the life of connected boards and relays.\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. Verify 24V output on the secondary after installation before closing the panel. Photograph all wiring connections before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. In stock — ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Factory-matched replacement for Carrier model \u003cstrong\u003ePF4MNB025T00ABAA\u003c\/strong\u003e fan coil units and compatible air handlers. Always verify your unit's data plate voltage requirements match 208\/230V primary before ordering. Our team is available to confirm fitment — reach out before you order if unsure.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62643269730675,"sku":"CARRIE-PF4MNB025T00ABAA-TRANSFORMER-HT01CN241","price":108.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62643269763443,"sku":"CARRIE-PF4MNB025T00ABAA-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_d4ac47f9-44e4-44d7-8027-b732bf58f92a.jpg?v=1775041607","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pf4mnb025t00abaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}