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Too many "do-dahs" and most of them problems. I can tell you the dripping on the PTR valve is due to the tank being waterlogged and that can cause problems with the temp sensors as well. I would correct that by draining the tank and refulling in again so that the air cushion is restored and see if this corrects this. Please get back to me if you need more later as all follow ups are included in our fee.
It may be just not working the way it is supposed to. I don't think I really can tell you and you may have to discuss this with them. New systems are usually "buggy" and it takes some time to sort out. My guess........and it is just that, would be some sort of electrical feedback issue OR loose connections. Tracking this down may take some time and I would give them a call. Since I really can't give you an answer based on anything but hunch, I will opt out of this and allow another tech here to offer something. I don't recall seeing this question before and I am on here almost every day.