how old is thr dryer? if its not that old go to repairclinic.com and search out what its doing this site will tell you how to fix your dryer and give you a link to the cheapest parts available which you will have in about 2 days. 8 out of 10 times its the timer switch
which operates everything andf that site will tell you how to test it, all you need is hand toold and an ohm meter.
i also and a fan of JB weld on the oil pan, had to do it a while back on my wifes grand marquis thanks to a hunk of steel lying in the highway.
drained the oil and then used carb cleaner to get the residue, stuck the JB weld and it worked perfect.