I have a GE Spacesaver gas dryer, model number DSXH47GGWW. When I start it, it starts to heat and then shuts off with a clean the lint filter message. The lint filter has been cleaned completely and the back has been vacummed, etc. HERE IS NO LINT ANYWHERE! Originallly thought it was a seal or bearing but now I am wondering if it is a sensor??? Any recommendations?? Thank you!!! Dryer is only 4 years old and has not had heavy use. A schematic would be nice too!