I have an older BA EM 203T. It has been working fine until I was getting ready to use it, pushed the pneumatic control button to turn on the jets and the GFI tripped. I can push reset, but almost instantly it trips the gfi again. I have checked and all connections seem to be good. No broken wires. there were a lot of ants that had gotten inside the box, they were all dead and I removed them all. Any thoughts on what to check next?