I do apartment maintenance. the property I work at is only 124 units. 1.5 to 2 ton goodman units. property was built in 1999. most units are original. several are 2-3 years old. on several condensers, at shut off they click multiple times, at the contactor, kinda like a short cycling sound. otherwise they cool just fine. since some of the units are only a year or two old and some are the old originals that do this, I was looking for a little insight as to what the problem might be. Thanks for any advise you have to offer!!!