I have an Amana gas dryer that I have been having trouble with. It started with pushing the timer switch to engage and it would buzz but not start. I had the timer apart a few times and would clean the copper contacts with sand paper and then reassemble. I was able to do this and keep the dryer working for almost 2 months. Finally it did not work anymore and I replaced the timer. Now the dryer will start on the timed cycle and run for between 10-20 minutes then it will buzz and quit. If I let it cool down I can restart it about 45 minutes later. I have already cleaned all the lint I can find out of the duct and the interior cabinet. Is it likely that the Cycling Thermostat needs replacement? I am afraid I do not have the know how or equipment to test this. I am just throwing parts at this to save buying a new $500 dryer. Any help would be appreciated.