Darrel F Menifee , CA March 06, 2016 Appliance: Samsung Dishwasher DMT800RHW/XAA Samsung Dishwasher Dmt800rhw/Xaa / : Samsung dishwasher 9e errorcode. How to replace Assy-Case Sensor;Dmt800,. Watched a you tube video. Found it was not uncommon. Didn't look difficult, so first I tried cleaning it to no avail--three times. So I ordered the offending part from appliance parts pros. 3 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours