Introduction
If a Samsung front-load washing machine shakes violently, makes loud knocking noises, or won’t spin out and shows errors like UR, UB, or DC, the washer is usually going out of balance. This guide walks through the same checks a shop would do, starting with simple leveling and ending with internal suspension, rotor, and tub problems that can be too expensive to fix. This guide is based on a specific Samsung front-load washer, so your model may look a little different.
What you need
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Step 1 Gather tools and plan your troubleshooting
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Gather a drill or screwdriver with a Phillips bit for the covers and panels.
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Have a 10 mm socket wrench ready for shipping bolts and some shock absorber hardware.
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Have a 19 mm socket or impact gun ready if you plan to remove the rotor.
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Step 2 Level the washer and check the floor
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Place a level on the washer to check for sagging to any one side.
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Check level at the front and at the rear of the washer.
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Adjust the feet at each corner by screwing them in or out until the washer is level.
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Make sure the floor is firm and hard, because a weak floor can cause shaking even if the washer is level.
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Install anti-vibration pads or a mat if the floor is imperfect and you still have movement after leveling.
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Step 3 Remove the top cover
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Use a Phillips screwdriver to remove the two screws at the rear of the top cover.
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Slide the top cover backward, and lift it off the washer.
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Step 4 Inspect the suspension springs
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Inspect the two springs that hold the tub up from the top of the washer.
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Look for springs that are warped, damaged, or off their mounting brackets on the tub or the chassis.
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Use a trampoline spring tool to remove and install a spring if you need to replace one.
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Step 5 Inspect the counterbalance weights
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Inspect the counterbalance weights on the front of the tub for cracks or damage.
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Check the counterbalance under the front of the washer by tilting the washer on its side and looking for concrete dust or debris.
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Step 6 Test the spider bracket and inner tub
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Open the washer door and try to wiggle the inner metal tub independently of the outer plastic tub.
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Treat any independent play or shifting as a strong sign the internal spider bracket has broken.
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Spin the drum by hand and watch for a non-circular, warped, or wobbling pattern.
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Check the drain trap, if your model has one, for small metal chunks that suggest internal metal parts are disintegrating.
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Step 7 Remove any shipping bolts
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Inspect the four shipping-bolt locations on the rear of the washer for bolts that were never removed after installation.
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Remove any shipping bolt using a 10 mm socket wrench.
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Step 8 Remove the rear panel
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Use a Phillips screwdriver to remove the four screws securing the rear metal panel.
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Slide the rear panel down, and pull it away from the washer.
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Step 9 Inspect and test the shock absorbers
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Inspect the rear shock absorbers for separation, because some can come apart and sometimes pop back together.
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Remove a shock absorber to test it if it looks damaged or if the washer still goes out of balance.
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Use a 10 mm socket to remove the top and bottom hardware on this style of Samsung shock absorber.
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Press the shock in by hand and confirm it is extremely difficult to compress.
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Test each shock absorber individually, because a washer may have two, three, or four shocks depending on the model.
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Step 10 Remove the rotor carefully if you suspect a drive issue
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Use a 19 mm socket or impact gun to remove the rotor bolt.
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Pull the rotor plate off evenly by pulling from both sides with equal spacing.
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Step 11 Inspect the rotor and stator and check for rubbing and play
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Inspect the rotor magnets for cracks, missing pieces, or other damage that could cause improper rotation during spin.
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Inspect the stator on the tub for similar damage.
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Check for excessive play in the spider bracket and bearing area, because too much movement can let the tub assembly rub the front of the washer.
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Step 12 Consider control board and expected spin behavior
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Expect brief movement and some noise during early spin, because these washers may intentionally shift to rebalance clothes before full-speed spin.
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Treat violent shaking, failure to spin out, or the wash time increasing as signs of an out-of-balance failure that still needs a mechanical cause found.
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Consider a control board or PCB malfunction only after mechanical checks, because the source video describes it as difficult to diagnose.
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Most severe shaking and UR, UB, or DC-style unbalance problems come from simple leveling, forgotten shipping bolts, worn shocks, or damaged suspension parts. If the inner tub wobbles independently, shows metal chunks in the trap, or has excessive play and rubbing near the bracket and bearing area, the washer may not be economical to repair. The source video mentions PCB and VRT-related behavior only in general terms, and it doesn’t include detailed board diagnostics or bearing replacement steps.