Drum won't turn

Motor bad

The flame sensor is fine because it is powering up the ignitor. The dryer does heat a little. It can be only one thing: The solenoids are aged and weak. They work at first then the heat up and quit.

How to video

Service manual and more HERE

The motor of drum is not work . Just check the motor and power feeds to it

Your dryer has a bad motor or something fell into blower wheel and not allowing motor to turn. The drum turns only one way because of locked motor. Will need to open top and then take front panel off to dismantle unit.

It could be several other things thermal fuse, thermal cut out, hi limit thermostat, dryer coils, heat sensor,or igniter. All of these parts are inexpensive and easy to test and replace.There is a video at t http://appliancehelponline.com/gdryertroublevideo.html his will walk you thru the troubleshooting of these components. It may be a different model but the troubleshooting will be the same.You can also enter your model # for diagrams and illustrations. All parts come with installation instructions. Not all models are available. If you need help disassembling your machine there are videos of this also for most styles.

Belt problem.
Kenmore dryer repair in orange county, ca
appliance repair orange county, ca

The belt might be slipping and not turning the drum.

May be belt broken

If you heat a click when you push the button,but the drum doesnt turn your belt is broken. About $15 and simple to install.

It sounds like the motor switch which is actually inside the motor on the model. It is very expensive to replace motor so it may not be worth fixing......
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Although I stick to the above statement; I have seen cases where a thermal fuse wire has come loose and perhaps sometimes touching(allowing heat) and sometimes not(hitting something blowing the breaker.... Check all wires on blower vent area... GOODLUCK!!!