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A musty smell almost mildew when using it in the Dry mode. Mr Slim split 30,000 btu

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  • robert330 Jul 27, 2009

    Thank you for your in depth response. Excuse my ignorance but it sounds like you are referring to an HVAC ducted system. Mine is merely a split with the controller in my apartment and the compressor on my roof. I definitely know a qualified contractor who installed the unit but I don't think he has your experience in killing molds which is extremely important to me. Does the work that your suggesting take place at the controller or the outdoor compressor? If it's the compressor how do I insure that the UV light will not get wet?

    Thank you



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Dirtys sock syndrome is bacteria growing, usually in the coil and pan area. The solution is for your to do a thorough cleaning of the indoor coil, pan and drain, using a good, stiff mix of coil cleaner and disinfectant, like Lysol. The entire area must be kept WET for at least 10-minutes and then be thoroughly rinsed to flush away the bacteria."

What would solve this problem permanently after cleaning the coils is to install an ultraviolet C lamp just above your evaporator coil. You can do it yourself very easily. The things are readily available on the internet (Carrier/Bryant and Aprilaire) for about $250.00 or you can have a contractor do it for about $500.00 (systems up to 3 tons) Add about 50% to this figure for a 4 or 5 ton unit which should have a double lamp system.

Some added information on the lamp.
There are several schools of thought about what these lights will and will not do. Distilled to simplest terms--they won't kill germs or mold "on the fly" flowing through the air stream of your hvac system with any precision. They will kill mold and bacteria on your cooling coil, keep your drain pan clean and improve the heat transfer ability of your coil by keeping it free of the nasty black junk that always seems to grow on coils that don't have a uv lamp. This should eliminate any mold smell originating from your cooling coil and prevent subsequent "seeding" of such organisms to distant parts of your system. It WILL NOT fix problems with existing mold in your ductwork past the area the lamp is installed. Your ductwork should be thoroughly cleaned to fix this (and make sure it is not unconnected somewhere which could cause condensation and mold).
Let me know how this turns out.


Posted on Jul 26, 2009

  • Benjamin Patri
    Benjamin Patri Jul 27, 2009

    You can get outdoor UV light units, it would go on top with the compressor, or something can always be custom made



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