I replaced a faulty circuit board in one of these, and I am having some problems adjusting the temperature afterwards. Initially with the replacement circuit board the temperatures were WAY too high. I found some potentiometers to adjust, but I am not really sure how they operate. I might think one of them controls the minimum temperature and the other wound works like a k-factor for the temperature range.

If anyone has any knowledge to depart regarding this I would be eternally grateful.