Originally Posted by Chestr
THermostat is sealed unit.
No sir, you have the wrong things pictured.
Your thermostat and hi-limt/ECO thermostat is underneath the rubber cover that says RESET on it as in your picture here. They have the two red wires running to them
This pic below is your electronic brains aka module board.
Hold on and I will find a previous thread on how to troubleshoot.