Take a look at the fuse linked here
Pop the top up on the dryer (with it unplugged)
The fuse is attached to the right rear wall of the dryer
right beside the terminal block (where the cord attaches)
unplug the wires from the fuse and check continuity
no continuity = bad...and if so check your venting
for a crimp or restriction as well as the lint filter housing,
it tends to clog up at the bottom.
correct the problem before replacing the fuse (if it's bad)
or it will blow again.
Source: Frigidaire FDE647RFS1 dryer wont start