Thanks guys,
I understand a leak would cause a low charge situation, but the system was working good before, and had never been serviced during my ownership so I would think that a leak would have shown up before..He told me he added about a pound, and then this started..That was why I was wondering if possibly that one of the switches could be acting up...I would find it hard to believe it would all of a sudden have a leak after he added, but I guess its' possible..It does seem to be cooling okay even with the compressor going on and off....
John