{"product_id":"carrier-pf4mnb049l00abaa-transformer-h3hwwy","title":"OEM Carrier 40VA Transformer 208\/230V–24V for PF4MNB049L00ABAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer 208\/230V–24V for Model PF4MNB049L00ABAA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement control transformer (Part #HT01CN241) for the \u003cstrong\u003eCarrier PF4MNB049L00ABAA\u003c\/strong\u003e fan coil and air handler. The transformer is the heartbeat of your HVAC system's low-voltage control circuit — it steps down the 208\/230V line voltage to the 24V signal that powers your thermostat, contactor coil, relay board, and every other control component. When the transformer fails, the entire control circuit goes dead: your thermostat goes blank, your system won't call for heating or cooling, and nothing responds. A blown transformer is often caused by a shorted control wire or a failed component that drew too much current — always inspect the 24V side for shorts before installing a new unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 208\/230V Primary | 24V Secondary | 40VA rated | OEM Part #HT01CN241 | Factory-matched Basler Electric construction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM transformer built to exact factory VA and voltage tolerances. Undersized or off-brand transformers can overheat, trip the internal breaker, or deliver unstable 24V — damaging thermostats and control boards downstream.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Turn off power at the disconnect and breaker before touching any wiring. Tools needed: flathead and Phillips screwdrivers, multimeter (to check for 24V shorts before powering up), wire nuts or spade connectors. Always verify the cause of the original failure before energizing the replacement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Direct OEM replacement for Carrier model \u003cstrong\u003ePF4MNB049L00ABAA\u003c\/strong\u003e fan coil \/ air handler units. This transformer is also used across Carrier, Bryant, ICP, Heil, and Tempstar platforms sharing the HT01CN241 specification. Confirm your unit's data plate shows a 208\/230V primary and 24V\/40VA secondary requirement before ordering. Have a fitment question? Our HVAC parts team verifies compatibility before you buy — reach out before you order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62643258327411,"sku":"CARRIE-PF4MNB049L00ABAA-TRANSFORMER-HT01CN241","price":108.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62643258360179,"sku":"CARRIE-PF4MNB049L00ABAA-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_62a24a97-1bfa-4e0d-a498-53fa76d80df4.jpg?v=1775016422","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pf4mnb049l00abaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}