You likely will have to tip washer to see rear feet to determine if you need a screwdriver, visegrip pliers or wrenches to loosen adjustable screw system. If they are fixed position, then front feet were designed to go up or down enough to give full ranges to level (except probably in an uphill or downhill place where 99 out of a 100 people would not place an appliance). Sometimes (and recently) some brands were recalled because no adjustment was possible to eliminate vibrations. Check for any recalls.
Will you please tell us what brand and model of washer you are using and what is the age of your washer? Some washer have independently adjustable feet and some have not. If you have first type of washer then you have to do some steps.
1. Place the level on the front of the washer's top cover. Place it parallel to the washer's face panel. Observe the reading on the level.
2. Place the level on the edge of the washer's top cover. Place it perpendicular to the washer's face panel. Observe the reading on the level.
3. Move the washer away from the wall a few inches if it needs to be leveled. Tip the washer back and slip the block under the front to hold the front feet off the floor. Loosen the lock nuts with the wrench, then turn the feet in or out as dictated by the level readings you saw in Steps 1 and 2.
4. Tip the washer back, then slip the block out from under the front. Set the washer's front feet on the floor. Tip the washer forward, then slip the block under the back to hold the rear feet off the floor. Loosen the lock nuts, then turn the feet in or out as dictated by the level readings you made in Steps 1 and 2.
5. Tip the washer forward, then slip the block out from under the back. Set the washer's back feet on the floor.
6. Repeat Steps 1 and 2 to check for levelness. Repeat Steps 3 through 5 until the washer is level and all four feet touch the floor.
7. Tighten the lock nuts against the washer cabinet on all four feet once the washer is level.
8. Move the washer back to its intended position. Recheck levelness to be certain the washer is level and that all four feet touch the floor.
9. If your washer parts like washer feet or washer level lock nut is broken then you have to replace the foot or have to adjust with wood or any solid material.
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