I bought a brand new dishwasher and within minutes of installing it, the dishwasher started itself, as in clicked "normal" and then clicked "start" all by itself. It has capacitive buttons and it seemed it was registering phantom button presses. I fiddled around and tried a few different things but nothing seemed to help. So I called Maytag and they sent out a repairman. He replaced the control panel and the problem persisted. He then replaced the second circuit board (there are only two, one of which is the control panel), and the problem persisted. Finally, Maytag replaced the entire unit. The problem has continued, and once again it started within a few minutes after installation.
At this point, I find it unlikely that the problem is in the dishwasher. I suspect the issue may be dirty power or a wiring issue in my wall. They tested the outlet with a basic outlet tester and everything was fine.
So, where would you recommend I go from here? I know capacitive buttons can be sensitive to noise on the wires, so I suspect dirty power of some sort, but I have no idea how to prevent that. Should I try an uninterruptible power supply and see if the problem disappears? Is there a simple noise filter I can install inline?
The phantom button presses are very frequent. This makes testing a solution and seeing if it works simple and conclusive. I'm just not sure where to start or if this is the right direction to go.