Originally Posted by Gcopeland
Thanks for the replies. It was the contact was stuck... We ordered a new one.
That's fine but the question is, How did it get stuck? Getting stuck implies that someone was using it and when they let go of the switch, the relay contacts stuck together. The relay shouldn't have just activated on its own.
BTW: Most of these thrusters have a switch to turn them off in addition to the switches to activate them in either direction. Some folks would recommend turning the switch off when you're not using the thruster. I don't but I probably should.