[handieman]

I overlooked one important item in the search for a solution to this problem. This problem also is more common in the summer than winter. The drain pan that receives the water from the AC coils that extract moisture from the air can be a culprit. This collector pan drains into the PVC (plastic) pipe that they told us all to clean out with vinegar. The pan can become clogged with dust and not allow the water to drain down the outlet pipe, thus harboring dust and moisture that breeds musty smells. In most cases this area is accessible from a side panel on the HVAC unit. If in doubt call a pro.

One other thing about furnace filters. The plastic one that came with the furnace is useless and the fiberglass cheapies are almost as equally useless. I would suggest a medium priced waffle type to remove the dried skin, pet dander, dust, and pollens that are floating around inside your home

Hope all your problems go away ;D

Handie :joke: