Thanks guys for the info

This is what it says for Hysterysis in the manual that came with the thermostat and there is a setting for it on the VE-100

Hysterysis- This setting is the number of degrees below the set point that power to the heater will be turned back on . For example: A set point of 90 with a hysterysis of 2 will turn power to the heater back on when the probe temperature falls to 88.

Would it be better to upgrade to a better Thermostat like the VE-300

thanks again