I wanted to bring this thread back to the top and post an update.
I just spoke with Dan at OGS regarding your control unit. As I understand it, he has sent/is sending you a replacement.
That being said, the control unit you returned had been blatently tampered with. The glue used to cover the screw holes to the case was removed. Furthermore, the glue used to cover the circuit board had been removed as well. Finally, the problem you had with the controller to begin with was caused by the fact that someone removed the shafts from both pressure switches and lost the springs out of them.
I don't think that you did this (Just to clear that up), but I know where that kit went when it left OGS. It was sold to one of our distributors, Dynamic Racing and in turn sold to where you purchased it. I have no reason to believe Matt at Dynamic would disassemble the control box so you can figure out on your own how it occured.
That being said, since we have been doing the propane kit, interestingly enough, we have had a total of 1 return from a customer and your control box returned. That's all. In both cases, the control boxes had been opened and tampered with.