{"product_id":"carrier-m150039mx41011523-transformer-h306bq","title":"OEM Carrier Transformer 40VA 120V-24V for M150039MX41011523","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model M150039MX41011523\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part number \u003cstrong\u003eHT01BD118\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eM150039MX41011523\u003c\/strong\u003e unit. The transformer steps down 120V line voltage to the 24V AC signal that powers your system's entire control circuit — including the thermostat, contactor coil, gas valve, and control board. When the transformer fails, nothing in the low-voltage control system receives power: your thermostat goes blank, the system won't respond to any call for heating or cooling, and no fault codes will display. It is often one of the first components to inspect when a system appears completely unresponsive.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input: 120V AC | Output: 24V AC | 40VA rating | OEM part number HT01BD118 | Factory-matched to Carrier M150039MX41011523 wiring harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound and insulated to Carrier's exact factory specifications, ensuring stable 24V output under full VA load. Generic units may deliver inconsistent voltage, causing erratic board behavior, nuisance lockouts, or premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the disconnect before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Verify output voltage at secondary terminals after installation before restoring full power. Always photograph existing wiring before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before 3PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for Carrier model \u003cstrong\u003eM150039MX41011523\u003c\/strong\u003e. Verify your existing transformer's VA rating and input\/output voltage on the unit's data plate or wiring diagram before ordering. If you are unsure of fitment, our HVAC parts specialists are available to confirm compatibility before you purchase. In stock and ready to ship today — get your system back up and running fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909287268723,"sku":"CARRIE-M150039MX41011523-TRANSFORMER-HT01BD118","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909287301491,"sku":"CARRIE-M150039MX41011523-TRANSFORMER-HT01BD118-GEN","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-HT01BD118_e1ab008c-49f9-4974-b7b0-48ce144dc104.jpg?v=1782939952","url":"https:\/\/nationalhvacparts.com\/products\/carrier-m150039mx41011523-transformer-h306bq","provider":"National HVAC Parts","version":"1.0","type":"link"}