Mmm, that sounds familiar. Try disconnecting them from the juice for a while and wire it back up. That seems to have brought back mine, after being completely unresponsive (unless it was wiring that came undone, but that wasn’t obvious).
I had that on my list of things to try before I spent a dime on replacements. For me, this is pretty easy–the box is plugged into a wall outlet in the garage. Will report back if that resolves everything. Or not.
–Richard
[edit] Workee. First relays I’ve ever had to reboot.