Harry W Mc Keesport , PA November 13, 2014 Appliance: Samsung Microwave SMH8165STE/XAA-0001 Samsung Microwave Smh8165ste/Xaa-0001 / : My samsung microwave completely shut down. How to replace All Purpose Appliance Cleaner. After getting help from your service tech the problem was narrowed down to thermostat; 101na,250/, which is located on the magnatron. The part came in 2 days and took 5 min. to replace. The micorwave now works like new. Thank you. Do-It-Yourself Rating: Repair Time Estimate: 2+ hours