If your Bosch dishwasher is leaking water, start with the most common cause: a faulty water inlet valve that sticks open and lets the tub overfill. If your Bosch dishwasher is leaking from door area or leaving water on the floor, the next likely problem is a cracked center wash arm assembly, lower wash arm assembly, or upper wash arm assembly. A damaged spray arm can send water straight at the door seal and force it out under the door, especially if the wash arm support is loose. After that, check the door seal or gasket for tears, gaps, or poor contact, and inspect the door hinge if the door is not closing squarely against the seal. A worn detergent dispenser seal or damaged dispenser assembly can also cause a Bosch dishwasher leaking from door complaint by letting water escape between the door panels. For a Bosch dishwasher leaking underneath or leaking water near the front, these are the parts most often responsible. Enter your model number on RepairClinic.com to find the exact Bosch water inlet valve, wash arm, wash arm support, door seal, door hinge, or detergent dispenser that fits your specific dishwasher.
01 - Bosch Dishwasher Water Inlet Valve
The water inlet valve opens to allow water to enter the dishwasher. If the water inlet valve is stuck open, the dishwasher will continue to fill with water until the dishwasher leaks or overflows. If the water inlet valve is at fault, replace it. Water inlet valves are not repairable—if the valve is defective, you must replace it.
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If the wash arm is cracked, it can allow a jet of water to spray toward the door seal, causing a leak. Remove the wash arm and inspect it for cracks. If the wash arm is cracked, replace it. Do not attempt to seal the crack with glue—the glue will break down in the dishwasher. If the wash arm is intact, make sure the screws in the wash arm support are tight. If the wash arm support is loose, water can spray out between the wash arm support and the lower pump housing, causing waves. These waves can cause water to leak out of the bottom of the door.
If the wash arm is cracked, it can force water to spray directly toward the lower part of the dishwasher door. The water can then be forced under the door and onto the floor, causing a leak. Remove the wash arm and inspect it for cracks. If the wash arm is cracked, replace it. Do not attempt to seal the crack with glue—the glue will break down in the dishwasher. If the wash arm is intact, make sure the screws in the wash arm support are tight. If the wash arm support is loose, water can spray out between the wash arm support and the lower pump housing, causing waves. These waves can cause water to leak out of the bottom of... the door.
If the upper wash arm is cracked, it can force water to spray directly toward the dishwasher door seal, causing a leak. Remove the wash arm and inspect it for cracks. If the wash arm is cracked, replace it. Do not attempt to seal the crack with glue—the glue will break down in the dishwasher. If the wash arm is intact, make sure the screws in the wash arm support are tight. If the wash arm support is loose, water can spray out between the wash arm support and the lower pump housing, causing waves. These waves can cause water to leak out of the bottom of the door.
Look for tears, gaps or cuts in the seal that could cause a dishwasher door leak. To determine if the door seal is making good contact, try closing the dishwasher door on a dollar bill all the way around the door. If the dollar bill does not stick, there is a gap in the seal. If the door seal has any gaps or leaks, replace it. If the door seal is working properly but the dishwasher is still leaking, check the door hinges. If the hinges are bent, the door will not close properly, creating a gap between the door seal and the dishwasher. If the hinges are bent, replace them.
A dishwasher detergent dispenser releases detergent into the tank during the wash cycle. Some dispensers with a rotating cover, or a latch, have an O-ring or seal that can wear out and allow water to leak inbetween the door panels and onto the floor near the bottom of the door.