i don't think you understand what you are talking about
also, i think you could use some HVAC training
when your not familiar with the issues you should not comment
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to JAW44, get the recommendations of the second tech along with pictures of the install
ask the service manager or owner of the original installing company to have a meeting with you
and see if you can get your problem resolved with a nice everyone is happy solution
this is all common sense stuff, it "sounds like" the second tech. was correct with his diagnosis
however i can not see your job from here, HVAC is a lot of common sense
use that common sense to figure out if you think the original installing company
should fix your problems for free, please let us know what happens
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