{"product_id":"carrier-pf4mna025l00abaa-transformer-h3hwwy","title":"OEM Carrier Furnace 24V Control Transformer for PF4MNA025L00ABAA","description":"\u003cdiv class=\"product-content\"\u003e\n\u003ch1\u003eOEM Carrier Furnace 24V Control Transformer for PF4MNA025L00ABAA\u003c\/h1\u003e\n\u003cp\u003eThe control transformer in your Carrier PF4MNA025L00ABAA steps the incoming 120V line down to the 24V class-2 power that runs your thermostat, gas valve, contactor, and control board. It is the low-voltage heartbeat of the system. When the transformer opens or shorts, everything 24V goes dead: a blank thermostat, no response to a call for heat or cool, no clicking relays, and often a popped low-voltage fuse on the control board. A transformer shorted by a pinched 'R' or 'C' wire will repeatedly blow that fuse the moment power is restored.\n\nThis genuine OEM transformer is rated 120V primary \/ 24V secondary at the factory VA load your furnace requires, with the correct mounting foot and color-coded leads. Matching the VA rating is critical — under-sized transformers sag under inrush and chatter the gas valve.\n\nWhy OEM matters here: cheap aftermarket transformers are often wound to a lower VA rating or looser voltage tolerance. The result is sagging secondary voltage that drops out contactors mid-cycle, overheats under load, and shortens the life of every 24V component downstream.\n\nInstall difficulty: 2 of 5. Tools: 1\/4\" and 5\/16\" nut driver, wire strippers, wire nuts, and a multimeter to confirm 24-28V across the secondary after power-up. #1 safety warning: SHUT OFF THE BREAKER before touching the primary leads — 120V is lethal. Verify with your meter that the line side is dead before disconnecting.\n\nShips same business day from our stocked warehouse on orders placed before 3 PM CST. Backed by a 1-year OEM warranty and 30-day hassle-free returns on uninstalled parts.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis part is compatible with Carrier model PF4MNA025L00ABAA. Always verify the part number against your unit's data plate before ordering.\u003c\/p\u003e\n\u003ch2\u003eWhy Choose OEM?\u003c\/h2\u003e\n\u003cp\u003eOEM parts are manufactured to the exact factory specifications for your unit. Generic aftermarket alternatives may fit physically but often use lower-rated components that reduce equipment life and void manufacturer warranties. When the cost difference between OEM and generic is $10-30, the OEM part is always the smarter investment on a system worth $5,000-$15,000.\u003c\/p\u003e\n\u003ch2\u003eShipping \u0026amp; Returns\u003c\/h2\u003e\n\u003cp\u003eSame-day shipping on orders before 3 PM CST. Standard delivery 2-5 business days, express options available at checkout. 30-day hassle-free returns on uninstalled parts — free return shipping included. 1-year OEM factory warranty coverage.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62643312198003,"sku":"CARRIE-PF4MNA025L00ABAA-TRANSFORMER-HT01CN241","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62643312230771,"sku":"CARRIE-PF4MNA025L00ABAA-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_17ca4b80-f5fc-44ce-acfa-e864ce509c14.jpg?v=1782919546","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pf4mna025l00abaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}