[Terry,OH]

I had the same temperature problem without stats, so I installed Bob's thermostats. The problem was solved! About 2 months later, I have the same problem again with the stats installed, I have pulled one of the stats and it also opened at the correct temperature, as yours did. I do find the three bypass holes to be very large! I did not have the time, at that point. to investigate further, so I replaced the stat and the problem is still there. It appeared the bypass hole size may be adjustable with a shutter??? Have only pulled one of the stats on the side of my temperature gauge. I am very interested to know what you find. I contacted Bob and he is willing to replace a bad stat. I have not taken him up on his offer yet because I do not know which stat or both are bad or if a new stat will operate the same.