I have found that when I unplug my power cord and plug it back in when returning to the dock, the main AC breaker flips off. I have a separate cord and breaker for my air conditioner and it does not suffer from the same problem. I am a real Luddite when it comes to things electrical and am without a clue as to what is going on. Once suggestion was to replace the breaker but when looking behind the panel it seems there are 3 "blocks" wired together. Any idea where one of these might be available. Thanks