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Mold Spots - Central Air Conditioner

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cbavasi
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Mold Spots - Central Air Conditioner

Postby cbavasi » Wed, 03 Jun 2009 5:43 pm

We are in the process of looking for a new apt. I've found one that I absolutely love but there is an isolated patch that appears to be mold around the air conditioning duct in the master bedroom. The air conditioning repairman was there when I went back to view the apt and told me the unit has been repaired but needs to be painted and a sealant applied.

Does anyone have experience with something like this? There are no other traces of mold in the other rooms and no odor anywhere. I'm worried this may be a bigger issue.

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pakjohn
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Postby pakjohn » Wed, 03 Jun 2009 6:03 pm

We had this problem and called out a repairman. He didn't find anything wrong; we cleaned everything and after a few weeks the mold came back. We finally figured out it was because the helper sometimes opened the windows when the aircon was on. The warm air would cause condesation to form on the aircon grill, the wet grill would then gradually grow mold.

The other cause for mold on a aircon duct/grill is due to low airflow across the cooling coils often caused by dirty filter or dirty coils. I don't blame you for being suspicious, if you really like the flat, take a picture of the grill for proof the problem was there when you moved in. However, it's a problem that should be easily fixed.
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cbavasi
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Postby cbavasi » Wed, 03 Jun 2009 7:03 pm

Wow thanks for that! Makes sense since each time I've been the air con has been running and a window has been open. It's an empty unit and I don't smell damp so hoping this is just a minor problem. We lived in a townhouse here with serious damp and I'm really hesitant now with any sort of mold.

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Strong Eagle
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Postby Strong Eagle » Wed, 03 Jun 2009 8:39 pm

Besides which... a long shot of Lysol disinfectant spray into the air intake does wonders for killing lots of stuff that likes to hang out on the evaporator coils and nearby. By long shot, I'm talking 30 seconds to a minute of full spray into the intake... longer if your intake is serving many rooms.


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