Factory reset does not help with either of the major failures, I tried multiple times before returning. The rapid on/off and the relay staying on both seem to be caused by hardware failures...

There are a bunch of 1 star reviews on amazon which show the same issue as well as other posts here, also equiwatt has recommended kp115 be disconnected and no longer be used due to this issue.

I just had a KP115 fail in the same way, it was connected to a freezer which had ~30W usage most the time with 300W occasional jumps. The switch probably got used twice since purchase (it was bought...