{"product_id":"liftmaster-un201","title":"LiftMaster UN201 500W Thermostatic Heater Kit — Documented Mega Tower \/ Mega Swing Applications","description":"\u003cp\u003e\u003cstrong\u003eThe LiftMaster UN201 is a 500-watt, 120V AC heater kit documented for Mega Tower and Mega Swing operator installations. Its fan and fixed thermostat provide controlled enclosure heating when installed in the specified location. The supplier describes a MAT\/MAST heater application, which must be checked against the exact operator and kit revision. This is an AC-powered heater assembly, not a generic 24V battery warmer or a replacement for repairing water intrusion, damaged covers or an unsuitable electrical supply.\u003c\/strong\u003e\u003c\/p\u003e\u003ch2\u003eCompatibility — Models, Versions and Exclusions\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eModel or selection point\u003c\/th\u003e\n\u003cth\u003eCompatibility requirement\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDocumented Mega Tower \/ Mega Swing configurations\u003c\/td\u003e\n\u003ctd\u003eUse the heater instructions and exact operator mounting arrangement.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMAT \/ MAST supplier application\u003c\/td\u003e\n\u003ctd\u003eConfirm the operator variant and current heater kit before purchase.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOlder heater references or revisions\u003c\/td\u003e\n\u003ctd\u003eMatch the delivered nameplate and instructions; do not mix ratings from different versions.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e24V DC battery circuits\u003c\/td\u003e\n\u003ctd\u003eNot the documented supply for this 120V AC kit.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOther gate enclosures\u003c\/td\u003e\n\u003ctd\u003eNo universal fit or permission to mount near arbitrary wiring or components.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eCheck Heater Revision, Supply and Mounting Clearance\u003c\/h2\u003e\u003cp\u003eThe installation sheet specifies the heater location and bracket arrangement for the supported equipment. Have the installer inspect available space, wiring and the enclosure before ordering. Heat must be distributed as intended without placing cables or other components against the heater. Any required mounting work should follow the documented arrangement rather than an improvised position.\u003c\/p\u003e\u003cp\u003eThe thermostat is not user adjustable. Its published warm and cool check points help verify operation; they are not a promise that the whole enclosure will remain at one exact temperature in every climate. The Test setting is temporary and must not be left selected. Also inspect the cover and installation for leaks or damage, since adding heat does not repair an enclosure problem.\u003c\/p\u003e\u003ch2\u003eSpecifications and Product Identification\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eUN201\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDocumented heater rating\u003c\/td\u003e\n\u003ctd\u003e500W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDocumented supply\u003c\/td\u003e\n\u003ctd\u003e120V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl\u003c\/td\u003e\n\u003ctd\u003eFixed, non-adjustable thermostat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSwitch modes\u003c\/td\u003e\n\u003ctd\u003eOff, Thermostat and Test\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer check points\u003c\/td\u003e\n\u003ctd\u003eFan on at 55°F \/ 13°C or cooler; off at 75°F \/ 24°C or warmer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDocumented mounting contexts\u003c\/td\u003e\n\u003ctd\u003eMega Tower and Mega Swing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eIdentify the full operator model and heater-kit revision.\u003c\/li\u003e\n\u003cli\u003eVerify the available 120V AC supply and applicable electrical requirements.\u003c\/li\u003e\n\u003cli\u003eCheck the specified bracket location and clearance from wiring and moving parts.\u003c\/li\u003e\n\u003cli\u003eConfirm the current kit contents and plan thermostat-mode testing after installation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003ePackage Contents and Separate Requirements\u003c\/h2\u003e\u003cp\u003eThe manufacturer instructions describe a heater, mounting bracket and supplied screws and flange nuts for the documented installation. Confirm the current supplier package matches that kit. A new operator cover, electrical branch circuit, battery set or complete weatherproofing package is not included. Older literature may describe a different heater rating, so use the delivered kit’s identification and instructions when confirming the order.\u003c\/p\u003e\u003ch2 class=\"safety-warning\"\u003eSafety Warnings — Read Before Installation or Service\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eWARNING: The heater uses hazardous mains voltage and produces hot air and hot surfaces. Installation and electrical connections require qualified personnel.\u003c\/li\u003e\n\u003cli\u003eDisconnect and secure power before installation or maintenance. Allow hot components to cool before handling.\u003c\/li\u003e\n\u003cli\u003eKeep wiring and other materials clear of the heater and preserve the documented mounting position. Do not connect this kit to a 24V battery circuit.\u003c\/li\u003e\n\u003cli\u003eDo not leave the heater in Test mode. Verify normal thermostat operation and restore the enclosure before returning the operator to service.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eRelated Products and Important Differences\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/garage-doorparts.com\/products\/liftmaster-lmrrul-monitored-retro-reflective-photo-eye\"\u003eLMRRUL monitored photo eye\u003c\/a\u003e — a separate protection option only where the exact operator and control revision approve it; not a universal legacy retrofit.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/garage-doorparts.com\/products\/liftmaster-lmwekitu-monitored-wireless-edge-kit-for-gate-operators\"\u003eLMWEKITU monitored wireless edge kit\u003c\/a\u003e — a separate edge communication system for approved controls and resistive edges; not a replacement for this mechanical or electrical service part.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eIs UN201 powered from the gate batteries?\u003c\/h3\u003e\u003cp\u003eThe documented 500W kit uses 120V AC, not the operator’s 24V battery circuit.\u003c\/p\u003e\u003ch3\u003eCan I adjust its thermostat temperature?\u003c\/h3\u003e\u003cp\u003eThe manufacturer describes a fixed, non-adjustable thermostat.\u003c\/p\u003e\u003ch3\u003eMay it remain in Test mode during cold weather?\u003c\/h3\u003e\u003cp\u003eNo. The instructions expressly warn against leaving Test selected; normal use is in Thermostat mode.\u003c\/p\u003e\u003ch3\u003eWill it fix water getting into the operator?\u003c\/h3\u003e\u003cp\u003eNo. Enclosure damage, sealing and site conditions need their own correction.\u003c\/p\u003e\u003ch2\u003eNeed Help Confirming the Right Product?\u003c\/h2\u003e\u003cp\u003e\u003ca href=\"https:\/\/garage-doorparts.com\/pages\/contact\"\u003eContact Garage-DoorParts.com before ordering\u003c\/a\u003e. Send the full equipment model, readable part labels and photographs of the installed assembly. Include the dimensions, electrical configuration or accessory details relevant to your project so the listing can be checked against the actual installation.\u003c\/p\u003e","brand":"LiftMaster","offers":[{"title":"Default Title","offer_id":60655782363422,"sku":"UN201","price":358.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0978\/2781\/5710\/files\/un201.png?v=1793139961","url":"https:\/\/garage-doorparts.com\/products\/liftmaster-un201","provider":"garage-doorparts.com","version":"1.0","type":"link"}