Gentlemen.

Thanks for the reply. Yes I have checked the nameplate. it is 100-125VAC. The actual voltage at the recept. is 122. I did check for voltage between neutral and ground and found none. However, I never checked while running. No, There is no reverse polarity on this circuit, however I am sure there is somewhere else in this facilty (lights, recepts.,ect.) as he has wired most of it himself.

I also checked for loose connections all the way back to the service disco. I am not aware of any other problems. But again this facilty has some very unique (more like scary) wiring methods. We have had some lightning, but not near as frequent as this is happening. His house is also on the same service and no other problems.

I guess I am not sure what you mean by equi-potential grids Larry. But, there are electric fences, video cameras, telephones, and water lines between the other buildings of the place. There are no large loads in this facility. As far as the power from the utility, I don't believe that has anything to do with it. And no other large facilities nearby except a large grain farm.

As far as the manufacturer, they have been no help. They just tell us that they diagnosed it as the timer board and replaced it. They have no reasoning for it.

Thanks again for any help. This is driving me crazy.