the wafer in the gqf is only for a backup... you should set it at 102... to do this turn the electronic thermostat all the way up... and see how hot it gets... if it stops before hitting 102 adjsut your wafer a bit and watch the temp increase, and repeat until it stops at 102
if it goes over 102 adjust the wafer the other direction and open the door for a sec to cool down the bator and see if it goes over 102 again... if it does dial the wafer back a little more and repeat until you get it to stay around 102
NOW .. once you've got the wafer set at 102 turn your electronic thermostat down, open the door to let it cool to around 95 and close the door again... now watch the light & the thermometer at the same time and slowly adjust the electroc thermostat until you get it balanced at 99.5
an easy way to tell what thermostat is controlling them temp is to watch the light... if it's flashing quickly as it reaches temp its the electronic thermostat working.. and that's what you want, it'll hold the temp dead on ... however if the light just clicks off as it reaches temp it's your wafer thermometer, and if that happens below 102 it's set too low.