Update. After many emails back and forth with G.Q.F (the manufacturer of the 1588), they have agreed to send me an updated replacement top. It appears from our conversation, that what has caused the temperature rise in my unit is that the 1588 is factory set to operate at humidity levels between 45 and 65% and that running it at lower humidity levels may cause the system to raise the heat levels. They did not come right out and say this, but they have made statements that could be understood this way. They have maintained that there is nothing wrong with my unit, but that I should only use the wet incubation system (with 55% humidity level) because that is what the system is designed to be use with. I have asked them multiple time if using the dry incubation system with humidity level around 35% could be cause the inexplicable temperature rise, but they simply respond that they do not recommend using dry system and that is why my hatches are failing, and that it is not the fault of their incubator. They maintain this even after I have pointed out to them clearly that I followed their directions on my first batch and only hatched 1 out of 24 eggs. It's like talking to a record.
Anyway they said they will send me a new top; so let's see if they will. At least they are responding to my emails, unlike Cutler Supply that never has. I did not even contact G.Q.F, they called me because they saw my post on this forum about the problems with their product. They evidently don't like people commenting on the problems they are having with G.Q.F products on the internet and have a team to watch for this. Now that's a company that is watching out for their company name! No wonder it is so hard to find any negative reviews about their products.
Ooh I am very sorry about this. I would return it, and get a Hovabator with a wafer thermostat. I have this sort of problem with my Rcom mini incubator, It keeps levels of 50% humidity with water. I DON'T like that, and when I don't add water it beeps about every 15 minutes I think. The beeps aren't loud or anything, I just dry incubate, and let the beeps go off. Once I tried to disable the beeping, but I am not worried about it anymore.