It's a bit of an assumption...
"my problem is its not heating the water and i need to get to the circuit so i can solder the burnt out soldering point."
You are more likely to have a defective heating element.
But I'm just guessing.
Any electronics will be just behind the user controls at the top of the door. Wires going to the control board are unlikely to be soldered on. A failure to heat the water is unlikely to be due to a loose wire. The external cover for the top of the door is unlikely to be glued on.
Peccavi
April 2009