{"product_id":"carrier-pf1mnc042t00aaaa-transformer-h3hwwy","title":"OEM Carrier 40VA Transformer HT01CN241 for PF1MNC042T00AAAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01CN241 for Model PF1MNC042T00AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM step-down transformer is the factory-specified replacement for the \u003cstrong\u003eCarrier PF1MNC042T00AAAA\u003c\/strong\u003e fan coil unit. It steps 120V primary voltage down to the 24V secondary voltage that powers your entire control circuit — including the thermostat, contactor coil, and control board. When this transformer fails, the system goes completely unresponsive: the thermostat goes blank, contactors won't energize, and no heating or cooling function is possible. A blown fuse on the secondary side is often the first clue that this component has failed.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 120V primary | 24V secondary | 40VA rated | Direct OEM replacement | Part number HT01CN241\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA ratings with factory-spec insulation and thermal protection. Generic alternatives frequently drift under load, delivering under-voltage to the control circuit and causing erratic or intermittent system behavior.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Always verify 24V output on the secondary side before reconnecting the control circuit. Photograph or label all wiring before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before 3 PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed and verified for the Carrier \u003cstrong\u003ePF1MNC042T00AAAA\u003c\/strong\u003e fan coil unit. Confirm primary voltage (120V) on your unit's data plate before ordering. Need help verifying fitment? Our HVAC parts specialists confirm compatibility before you buy — no guesswork, no returns.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62643335823731,"sku":"CARRIE-PF1MNC042T00AAAA-TRANSFORMER-HT01CN241","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62643335856499,"sku":"CARRIE-PF1MNC042T00AAAA-TRANSFORMER-HT01CN241-GEN","price":30.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01CN241_8fa1482d-9127-4404-ae50-12468b9c62b3.jpg?v=1775016656","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pf1mnc042t00aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}