If your Bosch refrigerator is leaking water onto the floor, the most common cause is a clogged or frozen defrost drain that overflows the drain trough; thaw the ice and flush the defrost drain with hot water first. If the drain is clear, check the door gasket next, since a torn or misaligned gasket lets humid air in and causes condensation to run out the gap. Small cracks in the water tank assembly, a cracked or loose water inlet valve, or damage to the water filter housing or filter head are also likely culprits and can produce slow, hard-to-find leaks. Inspect fittings and seals, feel for wet spots inside the cabinet, and press along gaskets to check the seal. For repairs, replace cracked tanks, inlet valves, or housings rather than attempting a glue fix. You can enter your model number on RepairClinic.com to see parts that fit your exact refrigerator and get the right replacement part quickly.
01 - Clogged or Freezing Defrost Drain
If the defrost drain is frozen, the water will overflow the drain trough and drip down to the bottom of the compartment. This water can eventually leak onto the floor. Check the defrost drain to determine if it is clogged or frozen. If the defrost drain is frozen, thaw the ice. In addition, flush the drain with hot water to ensure that it is clear of debris.
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02 - Bosch Refrigerator Door Gasket
If a refrigerator is leaking water outside the appliance, it's possible a door gasket is damaged. A door gasket that does not form a proper seal to the refrigerator frame will allow warm humid air to enter the refrigerator or freezer compartment. This can create condensation which can then leak out the gap between the gasket and frame onto the floor. You should inspect the door gasket for any tears or twists and replace the gasket if necessary.
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Inspect the water tank assembly for any leaks. Be aware that the leak may be very small and hard to find. If you discover a leak, replace the water tank. Do not attempt to repair the water tank—glue will not stick properly to the plastic of the tank.
The water inlet valve opens to supply water to the dispenser and icemaker. If the water inlet valve is cracked or has a loose fitting, water will leak from the valve. Inspect the water inlet valve for cracks, and make sure that it is tightly secured to the water supply line.
The water filter head might be cracked, or the seal may be torn or missing. Inspect the water filter housing for cracks. If you discover any cracks in the water filter housing, replace it.