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Water pooling under or around your Bosch dryer, especially during or after a cycle, indicates a leak. Common causes include a clogged condenser unit, a blocked drain hose, or a faulty water pump in heat pump models. You might also notice damp clothes or a musty smell if the water isn't draining properly.
You'll likely need a screwdriver set (Phillips and flathead), pliers, and a small brush for cleaning. Replacement parts might include a new drain hose (e.g., Bosch part #00647920, $20-$40) or a condenser filter (e.g., Bosch part #00656033, $15-$30). A shop vac can be useful for clearing standing water, and a multimeter might be needed for electrical diagnostics (e.g., $25-$75).
Always unplug the Bosch dryer from the wall outlet before performing any inspection or repair to prevent electrical shock. Turn off the water supply valve if your Bosch dryer is a condenser model that uses water for cooling, although most Bosch dryers are ventless and don't have a direct water supply. Be cautious of sharp edges inside the appliance and wear gloves to protect your hands from cuts and debris.
If the leak originates from a cracked or damaged condenser housing, a professional technician is required for proper replacement and sealing. Issues with the internal heat pump system, such as a refrigerant leak or compressor failure in Bosch heat pump dryers, demand specialized tools and expertise. A faulty main control board or a complex electrical short causing the water pump to malfunction should also be handled by a certified Bosch appliance repair specialist.
For most Bosch condenser dryers, open the condenser flap, remove the condenser unit, and rinse it thoroughly under running water to remove lint and debris. Ensure it's completely dry before reinserting it.
While a clogged lint filter primarily reduces drying efficiency, severe blockages can sometimes contribute to excessive moisture buildup that overwhelms the condenser system, potentially leading to minor leaks. Always clean the lint filter after every cycle.
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