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Two things can cause this problem:
1. The check valve in your dishwasher may be defective, allowing water and food debris to seep (or run) back into your dishwasher.
2. Your drain hose may not be "mounted up" the way it should be. Look under your sink. Look at how your drain hose is connected to your garbage disposal. If the hose runs down to the floor of your cabinet and into your dishwasher, that is wrong. Instead, it should be mounted up so that water from the sink and garbage disposal would have to flow up first to get into the dishwasher. If you do this, then even if you have a bad check-valve in the dishwasher, it will prevent the problem (or greatly reduce the problem) of dirty water flowing back into your dishwasher.
First check out your model to see if it has a built in garbage disposal, if so, make sure it is not mucked up.
Run hot water down your sink drain while running the sinks garbage disposal. Pour baking soda down your sink garbage disposal followed by white vinegar. Let it sit and foam. Run hot water down sink disposer while running. When finished:
Run empty dishwasher with no soap, let dishwasher fill with hot water to wash and then pour 1 cup of white vinegar into the bottom and resume wash. Make sure you take it through the dry cycle. When finished, open dishwasher and let it air for a couple of hours, longer if you live in humid area. Hope these steps do the trick.
Can you provide a model number of your Bosch dishwasher ?
Depending on the model ( i.e. SHU, SHV, SHE, SHX followed by several caricatures etc. ) it can be several possibilities so I`ll hold off generalizing and instead try and speak specific about your model.
Check for a clogged drain (e.g.: via drain hose), or a water pump malfunction due to foreign obstruction (e.g.: glass, etc).
Note: If you changed a food waste disposer (kitchen sink area) and did not remove "plug" from disposer for dishwasher drain hose (assuming dishwasher drain hose connected to food waste disposer), then water cannot drain from dishwasher.
Check for any kinked hoses and check the drain spigot under the sink where the drain hose connects into the u bend. Usually this is where food gets trapped due to the spigot not being drilled out large enough. This then causes a blockage. Also check the non return valve under the filter and make sure the drain pump can turn freely. Hope this helps.
most common faults with dishwashers is a drain fault. Check for any kinked hoses and check the drain spigot under the sink where the drain hose connects into the u bend. Usually this is where food gets trapped due to the spigot not being drilled out large enough. This then causes a blockage. Also check the non return valve under the filter and make sure the drain pump can turn freely. Hope this helps.
the unit will not fill with water until it will drain as it needs to complete the drain function before it can move onto the next step.
make sure the non return valve under the filter is properly fitted in the sump of the unit. then check the drain spigot under the sink where the drain hose connects to the sink u bend. This is the most common causes of a blocked drain.
Locate the hot water supply hose under the sink that connects and follow it over to where it will connect to the back of the dishwasher. Look for sharp bends in the hose. There should be a valve where the hose connects to the under-sink plumbing. Rotate that valve counter-clockwise to assure that it is open.
If the problem continues, the solenoid valve may have immediately failed. That valve is just behind where the hose connects to the dishwasher.
Sounds like your waste water drains could be backing up and pushing water back into the dishwasher. Firstly try pouring Mr Muscle sink and plughole un-blocker down the sink and leave overnight next morning pour boiling water down the sink and your pipes should be squeaky clean. Hopefully this will improve the flow and prevent gurgling!
remove the kick plate below the door. youll see a white tray behind the kick plate. theres water in the tray thats activating a overflow switch. with a towel or 2 remove as much water from tray as possible. this will solve problem