Did you remember to pull out the power lead ?

Locate the metal cylinder inside. This is the heating core. The thermo fuse and reset button is located on top behind the power leades. Did you really disconnect power ?

Reach in from the left side behind the power leads and push lightly on the little button marked with red in picture 2. You will feel a little snap and a little movement if it resets.

If nothing happens, then your problem lies elsewhere. I am really sorry.