{"product_id":"carrier-pf4mnb037000aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 208\/230V–24V 40VA for PF4MNB037000AAAA","description":"\u003ch1\u003eOEM Carrier Control Transformer 208\/230V to 24V 40VA for Model PF4MNB037000AAAA\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM replacement control transformer (part number \u003cstrong\u003eHT01CN241\u003c\/strong\u003e) factory-specified for the \u003cstrong\u003eCarrier PF4MNB037000AAAA\u003c\/strong\u003e air handler. The transformer steps down line voltage to the 24V AC signal that powers your thermostat, control board, zone valves, and every other low-voltage component in the system. When the transformer fails — due to a short, wiring fault, or simply age — the entire control circuit goes dark: the thermostat goes blank, the air handler won't respond to any call, and nothing in the system will operate. Replacing it with the correct OEM unit restores factory-specified output and protects downstream components from under- or over-voltage damage.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 208\/230V primary | 24V secondary | 40VA output | Foot-mount chassis | Factory-matched output tolerance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This genuine Carrier HT01CN241 transformer is wound to exact factory VA and voltage specifications. Generic transformers often run inconsistent secondary voltage, which can cause nuisance lockouts, control board errors, or shortened board life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Always shut off power at the breaker and verify voltage is absent before disconnecting wires. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wire connections before removal. Confirm primary tap wiring matches your supply voltage (208V or 230V).\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 when ordered before cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as the direct OEM replacement for \u003cstrong\u003eCarrier PF4MNB037000AAAA\u003c\/strong\u003e air handlers. Verify your existing transformer's primary voltage, secondary voltage, and VA rating against your unit's data plate before ordering. Our parts specialists are available to confirm fitment — reach out before you buy for total peace of mind. \u003cstrong\u003eOrder now and this part ships today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62643265306995,"sku":"CARRIE-PF4MNB037000AAAA-TRANSFORMER-HT01CN241","price":108.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62643265339763,"sku":"CARRIE-PF4MNB037000AAAA-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_d6b70600-af0f-4e7e-be02-4cd282c5d65c.jpg?v=1775041182","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pf4mnb037000aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}