{"product_id":"carrier-pf4mnb037t00aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 208\/230V-24V for PF4MNB037T00AAAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer 208\/230V–24V for Model PF4MNB037T00AAAA\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM Carrier replacement transformer (part number \u003cstrong\u003eHT01CN241\u003c\/strong\u003e), factory-specified for the \u003cstrong\u003eCarrier PF4MNB037T00AAAA\u003c\/strong\u003e fan coil and air handler units. The transformer steps down 208\/230V line voltage to 24V AC to power the low-voltage control circuit — including the thermostat, contactors, relays, and control board. When this transformer fails, the entire control circuit goes dark: the thermostat display may go blank, the system won't respond to calls for heating or cooling, and no low-voltage components will energize.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 208\/230V primary voltage | 24V secondary voltage | 40VA power rating | Basler Electric model BE28316007 | Direct OEM drop-in replacement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound and encapsulated to Carrier's exact factory specifications, ensuring proper VA headroom and stable 24V output under full control-circuit load. Generic units often run undersized VA ratings, causing voltage sag that leads to erratic relay chatter, nuisance lockouts, and premature board failures.\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 24V output at secondary terminals before reassembly. Photograph all wiring connections before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. In-stock units ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Directly replaces the factory-installed transformer in the Carrier \u003cstrong\u003ePF4MNB037T00AAAA\u003c\/strong\u003e fan coil unit. Also used across multiple Carrier air handler and fan coil platforms — confirm your unit's data plate shows 208\/230V primary and 24V\/40VA secondary before ordering. Have questions about fitment? Our HVAC parts specialists verify compatibility before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62643263308147,"sku":"CARRIE-PF4MNB037T00AAAA-TRANSFORMER-HT01CN241","price":108.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62643263340915,"sku":"CARRIE-PF4MNB037T00AAAA-TRANSFORMER-HT01CN241-GEN","price":95.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01CN241_f4254108-b439-4efc-9bb4-35c6f9190eeb.jpg?v=1775041491","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pf4mnb037t00aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}