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I was given a very old Craftsman compressor. Its in excellent condition. The issue with it is that you will plug it in and it will start right up. I runs for a short period then trips the receptical GFI. This model is old enough that it has no ground although when I replaced the main cord I attached the ground to the control box frame. I'm not sure if its dirty contacts in the pressure switch, or the old motor. Its a simple set up with a 10 gallon take, a single cylinder cast iron pump and a simple pressure switch. It has an in line check valve. Any ideas on what exactly this may me and how to rectify it if its just that its an older unit running on a newer technology circuit?
Thanks
Thanks