Tells you 8 air filters are dirty and when they should be cleaned
1. Air Filter Appears Dirty One of the easiest symptoms to recognize is the appearance of the filter itself. Brand new filters appear nearly white. Over time, contaminants in the air will dirty your filter and turn it brown or black. A visual inspection can be your first confirmation of a bad filter. Always examine …
Tells you 8 air filters are dirty and when they should be cleaned Read More »