"How probable is it that the leak really sprung up on it's own due to testing the heat pump?"
We had a regularly scheduled maitnenance check on our AC (Heat Pump) yesterday. While our AC has been working very well, and I am here every day, Now it is leaking and not cooling properly. I am extremely suspicious of foul play. While I know some other companies have been known to sell people units who did not need them here, I had trusted this company which I will not mention. How could we spring a leak right after the guy checks our unit outside. He said he was mainly checking the heat pump and heating capability and circuits, but when he opened the area for the coils, there was a visible mist, and sound where the coil was leaking. I looked and it is definitely leaking. This is a Carrier FB4 type coil that is showing signs of surface rust on the sides where the copper(?) pipe bends are, and the unit is only 7 years old. He filled it with more freon for us to be cool overnight, but the unit is not working well and my lungs hurt a little and feel tight. How probable is it that the leak really sprung up on it's own due to testing the heat pump? What course of action would I have if it turns out foul play was involved? I have not accused anyone of anything, but I won't be able to sleep if I cannot cover my ass on this one and be as sure as possible that we are not being taken advantage of. I mean the AC worked before he came, and now it does not!
Thanks in advance