{"product_id":"carrier-pf1mnb036008aaaa-transformer-h3hwwy","title":"OEM Carrier 40VA Transformer 208\/230V–24V HT01CN241 PF1MNB036008AAAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer 208\/230V–24V for Model PF1MNB036008AAAA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement control transformer for the \u003cstrong\u003eCarrier PF1MNB036008AAAA\u003c\/strong\u003e fan coil \/ air handler unit, sold under OEM part number \u003cstrong\u003eHT01CN241\u003c\/strong\u003e. The transformer steps down 208\/230V line voltage to the 24V AC signal that powers your thermostat, control board, and all low-voltage switching circuits. When this component fails, the entire control circuit goes dead — the thermostat goes blank, the system stops responding to calls for heating or cooling, and no contactors, relays, or valve solenoids can be energized. A failed transformer is often mistaken for a thermostat or control board failure, making correct diagnosis critical before replacing more expensive components.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 208\/230V primary input | 24V AC secondary output | 50\/60 Hz | Factory-matched Carrier OEM part HT01CN241\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are manufactured to exact Carrier factory specifications for winding tolerance, VA output stability, and thermal protection — generic alternatives frequently underperform under high-demand load cycles, risking control board damage and nuisance lockouts.\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 (to confirm 24V output post-install). Label and photograph all low-voltage wiring before disconnecting. Re-energize and verify 24–28V AC at secondary terminals before reassembly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. In-stock units ship same business day when ordered by 5 PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as a direct OEM replacement for the Carrier \u003cstrong\u003ePF1MNB036008AAAA\u003c\/strong\u003e fan coil unit. Always verify primary voltage (208V or 230V) from your unit's data plate matches your supply circuit before installation. Questions about fitment? Our HVAC parts specialists confirm compatibility before you order — reach out via chat or phone.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62643343098227,"sku":"CARRIE-PF1MNB036008AAAA-TRANSFORMER-HT01CN241","price":107.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62643343130995,"sku":"CARRIE-PF1MNB036008AAAA-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_606f7f14-fe53-4b34-97cc-9f13ff608a19.jpg?v=1775016428","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pf1mnb036008aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}