{"product_id":"carrier-pf1mnc030005aaaa-transformer-h3hwwy","title":"OEM Carrier Control Transformer 40VA 208\/230V — PF1MNC030005AAAA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 208\/230V–24V for Model PF1MNC030005AAAA\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM Carrier control transformer (part number \u003cstrong\u003eHT01CN241\u003c\/strong\u003e), factory-specified for the \u003cstrong\u003eCarrier PF1MNC030005AAAA\u003c\/strong\u003e fan coil unit. The control transformer steps line voltage down from 208\/230V to a safe 24V AC signal that powers the thermostat, control board, and all low-voltage control circuit components. When this transformer fails, the entire 24V control circuit goes dark — you'll see no thermostat response, no relay or contactor actuation, and the system will appear completely unresponsive even though line voltage is present at the unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA power rating | 208\/230V primary input | 24V secondary output | Direct OEM drop-in replacement | Part No. HT01CN241\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier Factory Authorized Part engineered to exact impedance and thermal specifications. Off-brand transformers may share the same voltage ratings but often use lower-grade core laminations, leading to overheating, premature failure, and nuisance tripping of thermal protection circuits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Always shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (verify 0V before touching wires). Label or photograph all wiring connections before removal. Reconnect to the same terminals on the new unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty included. In-stock units ship same business day when ordered by cutoff time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Factory-matched for the Carrier \u003cstrong\u003ePF1MNC030005AAAA\u003c\/strong\u003e fan coil unit. Confirm your unit's data plate shows a 208\/230V primary and 24V secondary control circuit before ordering. Not sure if this is the right part? Our HVAC parts specialists verify fitment before every order — reach out and we'll confirm in minutes.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62643338969459,"sku":"CARRIE-PF1MNC030005AAAA-TRANSFORMER-HT01CN241","price":107.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62643339002227,"sku":"CARRIE-PF1MNC030005AAAA-TRANSFORMER-HT01CN241-GEN","price":94.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01CN241_83ffb068-e1cb-4ab2-8307-8043497ee2ae.jpg?v=1775025454","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pf1mnc030005aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}