Mine was leaking at the lower fitting on the condenser. I replaced the gasket and it still leaked and then stopped after a few days. Then we put the new bumper on and the AC is still blowing cold. When it doesn't, the dealer can fix it.
Do you mean passed away or just hasn't returned? If the latter, I often check the date of their last visit and hope that maybe they'll get an email alerting them to an old thread of theirs and come back and contribute. Sometimes it works.