I'm trying to help my mother-in-law with her dryer. I'm going to visit soon and hope to repair it. Here is the problem. When she runs the dryer on high or medium, after a few minutes it throws the circuit breaker. She says the clothes seem hotter than expected. If she runs on low or no heat, it runs without problem. She has cleaned out the venting, but can't take it apart to clean inside. I suspect the heating element or the thermostats. The parts diagram shows 4 different thermostats. Any idea which would be most likely to cause this problem? Should I suspect a heating element short? Or, might something else be likely to cause this problem. Since I'm traveling to visit, I probably will have to order parts ahead of time, so I'd like to only buy ones that might be causing this problem. I would appreciate some suggestions. Thanks.

Thanks. I called the local parts house and they have the parts, so that makes this much less complicated. I intend to check the breaker first and rule that out before tackling the dryer. I appreciate the advice.