When Was the Last Time You Really took A Look At your Indoor Fan Motor?
The blower motor in your furnace should, ideally, never get dirty like this. Dirt build up like this on the indoor fan motor usually means that the air filter in the furnace is being bypassed during the air conditioning cycle.
Dirt blower motors on the furnace usually means dirty evaporator coils and dirty air ducts. Regular maintenance and a quality good fitting air filter in your furnace help.
We Fix the Following Furnace Motor Problems:
Furnace Motor Hum or Vibrations
An Introduction to Indoor Air Quality (EPA)
Influenza and You http://www.flu.gov/
The Centers for Disease Control and Clean Indoor Air
What the Environmental Protection Agency is Saying About Clean Indoor Air
The World Health Organization and Indoor Air Quality
Learn More About AccuClean Air Cleaning Freon American Standard
Brochure for the American Standard AccuClean Whole House Indoor Air Cleaner