Peter,
A quick test is to find out if the system is hurting for air circulation. After running the cooling system for about 20 minutes, measure the air temperature at the point where the air is going back to the indoor system, measure the air temperature coming out of the indoor system...
I am replacing the bathroom sink drain which is about 40 years old. It seems that the flange and tail pipe is one piece, instead of two, so I can't remove it. Is there a way to remove the flange and tail pipe? I was able to remove the trap section.
I would appreciate any help with this...