Too hot
Hi, not sure if you ever received a reply, but there is a setting known as "bypass" on commercial thermostats, if you took the cover off to replace it, you can access this screw, it is part of the body of the thermostat, either to the left or the right of the knob shaft, usually has a "B" stamped, or molded into the body. What this setting does is when the thermostat reaches temperature, it would normally close, shutting off the supply to the burner, thus the temp would begin to fall, by the time it opened back up, the temp would have fallen too much, causing a large temp swing. The bypass setting opens or shuts a passage that "bypasses" the thermostat main valve, keeping just a little burner, making the swing, or fluctuation smaller. So, you probably have a setting too big, causing your bypass flame to be too big, raising, or keeping the temp too high, try turning it in (cw) to lower it slightly, a small turn makes a huge difference, so go easy. Hope that helps, and thank you.
×