Part solution, part explanation: Got same problem; pulled of lower right back plastic-cover, which revealed a lever, balancing on red stick. Seems the top of a float. If I gently press the lever down, the dryer works. While I do have a background which let's me know what NOT to touch, fiddling in "innards" carrying potentially lethal voltages is NOT advisable! However, my conclusion is, that the float-mechanism is either worn out or blocked. Next, I'll UNPLUG the POWER CORD, take everything apart, remove the offending part and see if any objects blocks the float/passage of water (lint?). If so, I'll clean it, reassemble the dryer and see what comes next. Otherwise, I'll take the offending part along to my local "appliance-pusher" (wossname in English?) and buy a replacement.
Per Termark, March 2007