We completed our second red carpet maintenance visit for this year. We have a couple of concerns and solutions. While I was servicing the air handler I noticed that the plenum shows sign of leaking air. This causes excessive moisture and leads to growth. We are recommending we seel the plenum with new tape and mastic. I also notice that the coil needs cleaning also. Cleaning the coil help with the efficiency of the unit and the air quality in the house.