You can store the dishwasher unused without moving it or you can also uninstall the dishwasher and store it as long as you prepare it properly first.
Disconnect Water Line Only
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Disconnect the electrical supply to the dishwasher. Switch the circuit breaker off or remove the necessary fuses to disconnect the power to the appliance.
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Turn the valves on the water lines beneath the sink to the right to turn the hot and cold water supply off. Turn these valves until they stop and you cannot turn them any further. Turn off the main water supply in the basement if you do not have supply valves under the sink.
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Turn the hot and cold water faucets on at the sink to drain water and pressure from the water lines.
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Unscrew the two or four screws holding the panel from the bottom front of the dishwasher in place to remove it. Unscrew the nut that holds the water inlet valve and disconnect it. Blow gently inside the valve to remove any excess moisture.
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Unscrew and remove the screws in the bottom tub area of the dishwasher beneath the spray arm. Lift off the sump cover and use the sponge or towels to absorb any standing water from the bottom of the dishwasher. Reassemble the dishwasher.
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Wipe out all moisture from the inside and outside of the dishwasher before leaving it unused for an extended period. Leave the door ajar about 1 inch, if possible.
Uninstall Dishwasher
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Unscrew the wire nuts from the green, white and black wires within the electrical box from behind the bottom front panel. Set them aside to save them.
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Unscrew the hose clamp that connects the dishwasher to the sink or the garbage disposal and disconnect it. You will find this hose in the front panel area.
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Locate any screws that connect the dishwasher to the counter. You may find metal clips along the side edges of the appliance when the dishwasher door is open. Unscrew the screws in these clips.
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Grasp the dishwasher with both hands and pull it toward you carefully. As you pull the dishwasher out, guide any drain lines carefully to avoid damaging them. Continue maneuvering the dishwasher out of the space until you have it completely free.
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Check for moisture anywhere inside or outside of the dishwasher, including filters and hoses. Wipe out any wet areas thoroughly before you store the dishwasher.
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Place the dishwasher in a climate-controlled storage area, if possible, to avoid damage that may result from extreme temperatures. Leave the door ajar 3 to 4 inches and cover the appliance with a sheet.