{"product_id":"carrier-pf1mnc025t00aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 120V\/24V for PF1MNC025T00AAAA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model PF1MNC025T00AAAA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01CN241\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier PF1MNC025T00AAAA\u003c\/strong\u003e fan coil unit. The transformer steps down line voltage (120V) to low-voltage control power (24V) to energize your thermostat, control board, and all 24V control circuit components. When this transformer fails, the entire control circuit goes dead — the thermostat loses power, relays won't energize, and the system will not respond to any heating or cooling calls. A failed transformer is often confirmed by measuring 0V on the 24V secondary while line voltage is present at the primary.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input: 120V AC | Output: 24V AC | VA Rating: 40VA | OEM Part Number: HT01CN241 | Factory-matched to Carrier PF1MNC025T00AAAA wiring harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers use factory-spec copper windings and Class B insulation rated for HVAC duty cycles. Generic alternatives may use undersized wire gauges that overheat under sustained 24V load, risking nuisance tripping or early failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Requires disconnecting line-voltage wiring; always shut off power at the disconnect and breaker before servicing. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers, multimeter to verify 24V output after installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e Backed by a 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed and factory-specified for the Carrier \u003cstrong\u003ePF1MNC025T00AAAA\u003c\/strong\u003e fan coil unit. Cross-reference OEM part number HT01CN241 against your unit's data plate or wiring diagram before ordering. Our fitment team is available to confirm compatibility before you purchase — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62643339297139,"sku":"CARRIE-PF1MNC025T00AAAA-TRANSFORMER-HT01CN241","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62643339329907,"sku":"CARRIE-PF1MNC025T00AAAA-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_05a5d896-99cd-42f5-a79a-9b039a178d70.jpg?v=1775041310","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pf1mnc025t00aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}