I'm sorry to hear your WF218 washer is "rattling" during the spin cycle. First, please make sure all four shipping bolts were removed from the back of the washer during installation. The shipping bolts hold the drum in place during shipping, but must be removed prior to using the machine.
Assuming the bolts were removed, the most likely cause of the rattling is that the washer is not completely leveled and sitting firmly on all four legs. Please follow this link, then select "Installation" >
Installation Procedure" > "STEP 5 Leveling" for the online instructions for properly leveling the machine: http://support-us.samsung.com/cyber...
Once the leveling is complete, be sure to lock the legs in place by screwing the plastic rings (leg locks) as far up as they'll go. This will help keep the legs from changing position over time due to even minimal vibration.
Finally, make sure there are no objects coming in contact with the washer once it is in place. Anything touching the machine, including racks, hoses or a neighboring dryer, could make a rattling sound during the spin cycle.
answered 3 years, 10 months ago