Siemens Dishwasher Not Draining (Do this ONE Thing First)

So, your Siemens dishwasher is not draining, and you are worried? Well, there are a variety of reasons why this could be happening.

Luckily, this is only a temporary issue in most cases, and I have found several ways to fix it.

Siemens Dishwasher Not Draining

If your Siemens dishwasher is not draining, mix baking soda and vinegar in one cup and pour the mixture into the standing water at the bottom of the dishwasher. If the water starts draining, rinse it with hot water while running your Siemens dishwasher rinse cycle.

In most cases, this will fix the draining problem of your Siemens dishwasher. If it does not, try the other troubleshooting methods mentioned below:

Check Garbage Disposer

Ensure that the garbage disposer is properly installed on your Siemens dishwasher.

Did you just recently replace the garbage disposer on your dishwasher?

Remember that the new disposer comes with a plug at the drain tube, which is to be removed before use. This is a widespread mistake committed by new dishwasher users.

Clean Air Gap

If you see water coming out of the air gap, it means there is a blockage between the air gap and garbage disposal.

To fix it, you must clean the inside of the air gap with water and baking soda solution.

Check Dishwasher Sump

Check the sump of your Siemens dishwasher for any blockage. It is in the bottom of the tub.

If you see any water standing there, it may be due to debris or food particles.

Clean it with baking soda and vinegar solution and see if it opens the drain.


If your Siemens dishwasher is not draining, don’t panic, as there are various methods you can follow to fix your dishwasher:

  • Correctly install the garbage disposer
  • Clean the air gap
  • Clean your dishwasher sump

If you still have issues with your Siemens dishwasher, contact Siemens customer support.

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