After reading the thread "Will Carrier survive?" I am worried about my new central AC installation (which was done about 3 weeks ago). Please see pics below.
Is the green film (copper oxide?) near joint and next to blue filter/drier something I should worry because it is corrosion, something that could cause problems (like screwing up the A coil) down the road?
Please advise, and if the installation wasn't done correctly, please advise what should I tell the tech, and what should I request the contractor to do (this system has 1 yr labor, 5 yr parts and 10 yrs compressor warranty). Thanks for your help.