I am getting a 3 ton heating and AC trane unit installed in my home. I am having difficulty with the installation. They installed the system and turned it on for 8 hours with no duct work. I found the filter completely full because it was in area full of blown insulation (attic). The coils were filthy. I was able to pick out insulation all over the coils even with the filter. They were willling to acid wash my coils or replace the system. I opted for replacing the system.
They thought they had finished the installation but my system froze up. The first time it was on for only an hour and then stopped working. It had been turned on three more times by the tech. They just realized that they did not do the calculation correct and I needed two more return vents.
Okay, my question. If this system was run without the correct return vents for days does it hurt the system? Does this problem create wear and tear on the system? I am paying for a new system I need to know if this is used or not. I must admit I dont believe what they are telling me just from the history so far.