Vieng K Macedon , NY August 22, 2016 Appliance: Samsung Washer WF218ANW/XAA-0000 Samsung Washer Wf218anw/Xaa-0000 / : "nd" error code. How to replace Pcb Assy. First, I checked the drain pump by connecting it to 120VAC external source and pump runs. Second, I checked for 120VAC on the drain pump's connector during spin cycle and got 0VAC. Third, I had to rule out that it wasn't a wire harness problem by doing a continuity check between the pump's connector and the controller board. Continuity between the wires are fine. The culprit must be the controller board! So I ordered one from appliancepartspros.com. It took me about 10 minutes to replace the controller board. And since I have the machine apart, I spent another 45 minutes cleaning out all the nasty slimes and cruds in all the hoses. 4 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes