3M Filtrete Ultra Allergen Air Filter  12x36x1 Filtrete Purple Air Purifier
Problem for 3M Filtrete Ultra Allergen Air Filter (Purple Series)...

My filters turn black after about a week




By jwheless1966 on Jul 02, 2009

" "
my filtrete central air filters turn black after about a week

Solution #1

posted on Jul 02, 2009
Not Rated)

justaskjoe

Rank: Guru 
Rating: 85%, 2034 votes
You definitely need to clean your air handler and your outdoor unit as well. If you are not sure on how to proceed, call in a pro. they always have special deals this time of year.
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