{"id":8093,"date":"2024-04-02T13:38:01","date_gmt":"2024-04-02T20:38:01","guid":{"rendered":"https:\/\/www.appliancepartspros.com\/b\/?p=8093"},"modified":"2026-07-14T08:51:54","modified_gmt":"2026-07-14T15:51:54","slug":"how-to-reset-a-mrcool-mini-split-ac","status":"publish","type":"post","link":"https:\/\/www.appliancepartspros.com\/b\/how-to-reset-a-mrcool-mini-split-ac\/","title":{"rendered":"How to reset a MRCOOL mini split AC in 5 easy steps"},"content":{"rendered":"","protected":false},"excerpt":{"rendered":"

If you need to reset your MRCOOL mini split AC, check out this handy guide so you can get your unit running smoothly again! <\/p>\n","protected":false},"author":3,"featured_media":8095,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"how to reset a mrcool ac","_yoast_wpseo_title":"%%title%% %%page%%","_yoast_wpseo_metadesc":"If you need to reset your MRCOOL mini split AC, check out this handy guide so you can get your unit running smoothly again!","_aviaLayoutBuilderCleanData":"[av_image src='https:\/\/www.appliancepartspros.com\/b\/wp-content\/uploads\/2024\/04\/Copy-of-Copy-of-Copy-of-Copy-of-Copy-of-Copy-of-Copy-of-Copy-of-Copy-of-Copy-of-Copy-of-IMAGE-TEMPLATE-FOR-BLOG-5-1500x430.jpg' attachment='8095' attachment_size='featured' copyright='' caption='' styling='' align='center' font_size='' overlay_opacity='0.4' overlay_color='#000000' overlay_text_color='#ffffff' animation='no-animation' hover='' appearance='' link='' target='' title_attr='' alt_attr='' lazy_loading='disabled' id='' custom_class='' av_element_hidden_in_editor='0' av_uid='av-luiuap7s' admin_preview_bg=''][\/av_image]\r\n\r\n[av_textblock size='' av-medium-font-size='' av-small-font-size='' av-mini-font-size='' font_color='' color='' id='' custom_class='' av_uid='av-luiu0nb6' admin_preview_bg='']\r\n\r\n\r\nMRCOOL mini splits are a popular type of ductless air conditioner used to cool or heat single rooms or spaces. Like all air conditioning units, mini splits can occasionally run into problems that require the user to reset them to the factory default settings.\r\n\r\n \r\n\r\nResetting a MRCOOL mini split air conditioner is usually fairly simple and may help you resolve minor issues with a unit that won\u2019t turn on or if you need to clear error messages after a repair.\r\n\r\n \r\n\r\nLet\u2019s find out how you can find the reset button on your MRCOOL mini split AC and reset it if needed.\r\n\r\n \r\n\r\nIf you need any replacement parts for your <\/strong>MRCOOL air conditioner<\/strong><\/a>, <\/strong>you can enter your model number<\/strong><\/a> at AppliancePartsPros.com<\/strong><\/a> to order them. Most orders arrive in just two business days, and we have thousands of free guides to show you how to install your new parts.\r\n\r\n \r\n\r\nDisclaimer:<\/em><\/strong> The troubleshooting information provided in this article is based on general service manuals and may not apply to your specific appliance model. While we strive to offer helpful advice for DIY appliance repairs, variations in models and configurations can lead to differences in troubleshooting steps, error codes and part replacements. For the most accurate guidance, we strongly recommend consulting the technical sheet for your specific appliance model.<\/em>\r\n\r\n \r\n\r\n[lwptoc numeration=\"romannested\"]\r\n\r\n \r\n

Full safety notes below<\/a><\/p>\n\n

When you should avoid resetting <\/strong>a MRCOOL mini split\u00a0<\/strong><\/h2>\r\n \r\n\r\nWhile factory resets can fix many basic mini split problems, there are certain situations when resetting will NOT help and may actually cause larger issues.\r\n\r\n \r\n\r\nAvoid resetting your MRCOOL mini split if:\r\n\r\n \r\n

You recently had the unit serviced<\/strong><\/h3>\r\n \r\n\r\nIf an HVAC technician recently repaired your unit and applied specific control settings, resetting deletes those changes. This could reintroduce the very same problems they just fixed. Always check with the technician before resetting soon after a repair or service call.\r\n\r\n \r\n

The outdoor unit isn\u2019t running<\/strong><\/h3>\r\n \r\n\r\nResetting ONLY restores indoor unit software and electronics. It doesn\u2019t impact external parts like outdoor condenser units.\r\n\r\n \r\n\r\nIf your outdoor mini split unit doesn\u2019t turn on, there could be larger electrical issues that resetting won\u2019t fix. Call for professional service instead.\r\n\r\n \r\n

If you haven\u2019t investigated an error code<\/strong><\/h3>\r\n \r\n\r\nError codes typically indicate hardware malfunctions that need to be repaired by a professional HVAC technician. The E1, E3 and E5 error codes may be able to be cleared by resetting, but avoid trying to reset the unit if it\u2019s displaying a different code.\r\n\r\n \r\n\r\nIf you reset your unit but the same errors display again shortly after, don\u2019t reset the unit again and schedule service ASAP. Ignoring recurring error codes can cause greater damage to your unit over time.\r\n\r\n \r\n

Issues persist after the initial reset<\/strong><\/h3>\r\n \r\n\r\nYou should only need to reset your mini split AC once to resolve software glitches or frozen controls. If any problems remain after the initial reset, then this points to a deeper system issue that needs to be checked out by an HVAC technician.\r\n\r\n \r\n\r\nMultiple resets can also wear down electronic components faster, so you should leave further troubleshooting to the professionals in this case.\r\n\r\n \r\n

How to reset a MRCOOL mini split AC<\/strong><\/h2>\r\n \r\n

Step 1: Find the reset button<\/strong><\/h3>\r\n \r\n\r\nThe reset button on most MRCOOL mini split indoor units is found on the control\/remote or behind the front panel, often near the air filter.\r\n\r\n \r\n\r\nHere\u2019s how you can access the reset button on standard wall-mounted MRCOOL units:\r\n\r\n \r\n
    \r\n \t
  1. Turn off the unit with the remote control or manual power switch.<\/li>\r\n \t
  2. Remove the front panel. You may have to remove clips, screws, or hooks that hold the decorative front cover in place.<\/li>\r\n \t
  3. Find the reset button (often labeled) on the interior control board near the air filter.<\/li>\r\n<\/ol>\r\n \r\n

    Step 2: Press and hold the reset button<\/strong><\/h3>\r\n \r\n
      \r\n \t
    1. If necessary, use a small object like a paper clip or pen point to reach the reset button.<\/li>\r\n \t
    2. Press and hold the button for 3-5 seconds until your unit beeps or the lights flash. The unit should immediately power off. At this point, you can release the reset button.<\/li>\r\n<\/ol>\r\n \r\n

      Step 3: Disconnect power (if required)<\/strong><\/h3>\r\n \r\n\r\nSome MRCOOL units require the user to disconnect them from the power supply for 30 seconds after resetting and before restarting them. Check your model's manual to see if this applies to your ductless AC. If so, flip the appropriate breaker or switch for 30+ seconds.\r\n\r\n \r\n

      Step 4: Replace the front panel<\/strong><\/h3>\r\n \r\n\r\nCarefully replace the front cover and any screws or clips to reassemble the unit.\r\n\r\n \r\n

      Step 5: Restore power<\/strong><\/h3>\r\n \r\n\r\nIf you cut the power in the previous step, turn it back on now. Your unit should restart itself within a minute or two.\r\n\r\n \r\n

      When to reset a MRCOOL mini split\u00a0<\/strong><\/h2>\r\n \r\n

      If the indoor unit won\u2019t turn on<\/strong><\/h3>\r\n \r\n\r\nIf your indoor unit won\u2019t power on at all, a reset can help clear any software glitches.\r\n\r\n \r\n\r\nStart by checking the power supply, breakers and fuses, then try resetting the unit if power is connected but the unit still won\u2019t start.\r\n\r\n \r\n

      If the unit won\u2019t heat or cool correctly<\/strong><\/h3>\r\n \r\n\r\nResetting the unit disables any incorrect user settings that could cause problems with heating, cooling, drying, ventilation, or fan speeds. After a reset, these functions will automatically return to the suggested factory standards.\r\n\r\n \r\n\r\nA reset can also clear minor system faults that may lead to improper temperatures, airflow levels or excessive noise.\r\n\r\n \r\n

      If you need to clear an error code<\/strong><\/h3>\r\n \r\n\r\nError or fault codes typically display when your MRCOOL mini split senses internal technical problems. While resetting the unit won\u2019t fix underlying issues that need to be repaired, it can clear error messages caused by temporary electrical, sensor, or communication failures.\r\n\r\n \r\n\r\nIf possible, note the exact error code before resetting the unit. This helps with diagnosing problems with specific parts that may need to be replaced.\r\n\r\n \r\n\r\nHere are some examples of errors that can cleared by resetting:\r\n\r\n \r\n\r\nE1 - Communication error between indoor and outdoor units\r\n\r\n \r\n\r\nE3 - Malfunctioning temperature sensor\r\n\r\n \r\n\r\nE5 - Electric control failure\r\n\r\n \r\n

      \r\n<\/strong>Other unusual behavior<\/strong><\/h3>\r\n \r\n