GE Dryer, automatic dry not advancing

[Washaman]

Got this dryer in today. Serviced and cleaned it and tested it out with a load of wet clothes on the Autumatic dry cycle. When I went to check it out the timer had not avanced but the clothes were dry. Is this the Bias thermostat on the blower wheel housing at fault?
Thank you for any input/advice.

Model dbsr453eb2ww

[JWWebster]

Did you check the timer motor for continuity? Will it advance in NO HEAT?

[Washaman]

Heat works fine. Was too late last night to do any other checks on it. I will check more today possibly.

[Washaman]

I will check to see if it advances with no heat, I will let you know. If it does, what does that mean?

[Washaman]

It IS advancing when I changed the temp to no heat. What would cause this?

[JWWebster]

If it advances in no heat but not on auto then their is a control problem so what controls the heat? The control thermostat. I would replace that first.

[Washaman]

That is what I planned on replacing first. Will do it tomorrow and let you know. Thanks

[JWWebster]

It IS advancing when I changed the temp to no heat.

[Washaman]

I finally got around to repairing this dryer today. I replaced one thermostat at a time, no fix. Replaced timer, no fix. Replaced timer motor, no fix. Replaced temp. control switch out of frustration, no fix. Couple more timer motors, no fix. Took it back apart one more time before calling a day, at midnight, and found the outer heating element had a hidden break in it inside one of the ceramic insulators. The first thing I usually check is this, but it was the last thing I checked this time. I only did a visual inspection, not a continuity test. So this dryer was not getting hot enough to operate the thermostat that cycles the timer. Lesson learned. 
 

[JWWebster]

wow, glad you could get er done! Yesterday my friend Larry called and said the dryer he was working on was blowing door switches. Blowing door switches I says to meself. I told him to bring it to the Doctor. After checking everything and all looked well I got to looking at the wiring. The small white neutral wire was connected to a one of them 240 legs. OOPz! Easy $20  

[RegUS_PatOff]

... found the outer heating element had a hidden break in it inside one of the ceramic insulators.
... I only did a visual inspection, not a continuity test.
... Lesson learned.