Unplug the machine for about 30mins check and drain coin pump and plug back in also what model is it and check samsung website and check their troubleshoot page
Check the drain pipe, if the end is submerged in water it will keep rinsing. Sometimes the flexible drain pipe will slide down ur main pvc drain pipe into the U bend and into the water.
how old is the washer? This normally indicates that the brushes around the motor have worn out. Made of Carbon they normally last about 5yrs depending on usage. Easy to replace normally try Espares for replacement.
