{"product_id":"carrier-pf4mnb037t00abaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 208\/230V–24V for PF4MNB037T00ABAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer 208\/230V to 24V — HT01CN241 for Model PF4MNB037T00ABAA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier control transformer (part# HT01CN241) is the factory-specified replacement for the \u003cstrong\u003eCarrier PF4MNB037T00ABAA\u003c\/strong\u003e fan coil and air handler series. The transformer steps down 208\/230V line voltage to the 24V AC signal that powers your thermostat, control board, zone valves, and all low-voltage control logic. When this transformer fails, the entire control circuit goes dark — the thermostat loses power, the system won't respond to calls for heating or cooling, and nothing turns on. It's often the first part to check when a system appears completely dead with no thermostat display.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA capacity | 208\/230V primary input | 24V secondary output | 60Hz | Factory OEM fit and dimensions — direct drop-in, no modification needed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact Carrier voltage and VA tolerances. Undersized or off-tolerance generic units can sag under full control-circuit load, causing nuisance lockouts, board resets, or premature component failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power to the unit before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, non-contact voltage tester. Label all low-voltage wires before disconnecting the old unit. The transformer typically mounts to the blower deck with two screws.\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 from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Factory-matched for Carrier model \u003cstrong\u003ePF4MNB037T00ABAA\u003c\/strong\u003e. Verify your unit's data plate confirms a 208\/230V primary transformer before ordering — some configurations use a 120V primary (HT01CN236). Questions? Our HVAC parts team verifies fitment before you order — ships same day!\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62643262914931,"sku":"CARRIE-PF4MNB037T00ABAA-TRANSFORMER-HT01CN241","price":108.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62643262947699,"sku":"CARRIE-PF4MNB037T00ABAA-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_7e48516e-d55f-44fb-9f0f-dcce69b3d09a.jpg?v=1775041614","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pf4mnb037t00abaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}