I had a similar issue. I replaced the gas valve that checked bad and thermal fuse as well. I reassembled the dryer and found the igniter would light and cut out after a few seconds. Long story short all components checked ok. Except I noticed a squeal when I started the dryer & the belt was fine. The motor centrifugal switch would not kick out due to a drum roller binding. I found of a bunch of hair caught behind the . So make sure that the drum rollers are spinning freely. A telltale sign is the drum will have rubber roller residue on the drum track or the dryer belt is glazed or breaks often. Needless to say I am going to shave every female's head in my household.