Question about Mitsubishi Mr. Slim MXZ30TN Air Conditioner

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I have three mr slim inside units...live in a very clean place, non-smoker, no pets, brand new renovation....problem is that the fans are constantly getting dirty. less than a month ago i had all three units taken down, thoroughly cleaned, drain hoses cleaned, etc. Put them back up and now they are accumulating what appears to be an abnormal amount of gunk on the fan blades. the filters are clean, the coils are clean, and the air intakes at the top of the unit are clean as well. anyone have any ideas on what could be causing this?

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  • Mitsubishi Master
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Very strange indeed! The ffault is on anyway and there is a dirt that comes on to stick to the fan. So the logic is that the fan is bringing up the dust to the fan either from the inside of the unit or from the outside. if you are spot sure that there is no question of dirt in the enviuorment that can bring in dirt, even by static , we must focus once again to see if any of the insulation pads are wearing off and coming into in a slow way. Analyse the dirt on the fan, use a good magnifying glass to check , I hope this investigation will be the key to the fault. Please give me a feedback, credit if helpful. Good day

Posted on Aug 20, 2010

  • Donald DCruz
    Donald DCruz Aug 20, 2010

    Just a thought came to my mind, please check your carpets/drapes if heavily furnished as the fibres can statically get caught on with the aid of moisture from the unit. Regards

  • oldtec Oct 11, 2010

    There is an issue with the fan wheel itself. It depends on the age of the unit and if it is still under warranty. The blower wheel must be replaced with a "negatively charged" wheel. The repair must be performed by a qualifieds service technician, it is not for the faint of heart or inexperienced. This is not only dirt, it is a mold issue as well. I don't remember the dates but if the unit was built after a certain date it shouldn't be a problem. If it is under 2 years old it should be covered under warranty. Contact a servicing Mitsubishi dealer don't let some schmuck wreck your unit it is not an easy job but really must be done.

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  • 3 Answers

You might have to run them on fan only for a half to 3/4s of an hour when you turn the a/c off

Posted on Aug 23, 2012

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