Christine M Du Quoin , IL March 04, 2016 Appliance: Samsung Washer WF448AAW/XAA Samsung Washer Wf448aaw/Xaa / : Wash cycle would not drain intermittently. How to replace Assy Pcb Main;Purple. Each time it happened I would remove the front cover and test pump which would ohm out at 14-16 ohms and also would always run when tested. I left the top off and hooked meter into the purple wire at main circuit board that goes to pump and the other lead to ground. Ran a load and was able to see when acting up no power was coming from board. Installation was very easy diagnosis was much harder 2 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours