Fixing a Thermador Dishwasher Not Draining

By SmartHomeBit Staff •  Updated: 06/08/23 •  12 min read

Dealing with a Thermador dishwasher not draining can be frustrating and cause significant inconvenience in your household. In this section, we’ll provide an outline of what to expect when troubleshooting this common issue, so you can keep your kitchen running smoothly.

Having trouble with your Thermador Dishwasher not draining? Dirty water, blocked filters, and clogged drain hoses could be the cause. Let’s fix it! Here’s what to do:

  1. First, make sure the wash cycle has finished before starting.
  2. Download the owner’s manual to know how it works. Keep an eye out for any issues.
  3. Learn how to tackle the draining problem.
  4. Check the drain hose is positioned correctly.
  5. Turn off power, disconnect hoses, and inspect for obstructions.

Clean your dishwasher monthly and clean out filter access on bottom racks. Not caring for it can cause more serious damage and even complete shutdown. Don’t miss out on protecting your kitchen gadget! Follow this guide to keep it running effectively.

Checking for Cycle Completion

After running your Thermador dishwasher, have you noticed any water still sitting at the bottom? It’s a frustrating occurrence that can be caused by various reasons. In this section, we’ll focus on checking for cycle completion to ensure that your dishwasher has gone through its full cycle and drained all the water. Let’s dive into this sub-section to understand how to recognize whether your dishwasher has truly completed the cycle and the steps to take to resolve any draining issues.

Cycle completion is key for a dishwasher. Check if the cycle is done first. After the wash cycle is done, the dishwasher will dry, then drain. This means dishes get clean and there’s no water left in a Thermador Dishwasher.

If it hasn’t finished its wash cycle, and water is still draining, there may be a problem with the sensors or display. Get help from a professional or Thermador customer service.

Do preventative maintenance to avoid future issues. Clean filters and check hose position. Dirty water and blocked hoses are common causes of dishwashers not draining correctly. Add these tips to your maintenance routine.

Cycle completion and dishwasher maintenance are important for optimal performance.

Operating the Dishwasher

If you’re having trouble with your Thermador dishwasher not draining, it’s important to make sure you’re operating it correctly. In this section, we’ll take a closer look at how to use your dishwasher by exploring key topics such as the owner’s manual, how to download a manual, the functions of dishwasher sensors, and changes you may see on the display during the wash cycle. With this information, you can have a better understanding of your dishwasher and how it works, ensuring a more efficient and effective cleaning experience.

The owner’s manual for a Thermador dishwasher provides info on how to operate it, for best results. You can download the manual online. Sensors use tech to monitor water level and pressure, adjusting the wash cycle. The wash cycle has different phases, based on heavily soiled dishes or delicate glassware. As the cycle progresses, the display updates the user on the current phase and time remaining.

To keep the dishwasher in good condition, users should check for signs of dirty water and filter obstructions. The drain hose should be positioned correctly with a high loop. If clogs are identified during use, turn off power and disconnect hoses to remove visible obstructions. Do a monthly cleaning, including cleaning the bottom rack filter, removing residues stuck in their layers.

In conclusion, the manual is great for operating a Thermador dishwasher. But proper maintenance is necessary to ensure optimal performance. With these tips, users can avoid draining problems and enjoy their appliance for years.

Common Causes of Draining Problems

Dirty water, clogged filters, and obstructed drain hose are some of the most common reasons for a Thermador dishwasher not draining properly. This section highlights the various factors that might be causing the draining problems in your dishwasher, so you can address the issue effectively.

Is your Thermador dishwasher draining slowly? It may be due to dirty water, clogged filters, or a blocked drain hose. Dirty water can cause blockages and stop the drainage process. Filters can prevent debris from entering the dishwasher pump, but they must stay unclogged to work properly. A bent or obstructed drain hose can also affect drainage.

Let’s get your dishwasher running optimally again. Start by checking and cleaning the filters and putting the drain hose in a high loop. Also, remove any visible obstructions from the drain hose and clean it monthly. To troubleshoot other drainage problems, follow these steps.

  1. Check the garbage disposal: If the dishwasher is connected to a garbage disposal, make sure it’s cleared of any blockages. Run the disposal and see if it drains.
  2. Inspect the air gap: Make sure the air gap is clean and unclogged. Remove any debris or blockages that may be affecting the drainage process.
  3. Unclog the drain hose: Disconnect and clean the drain hose to remove any blockages, kinks, or obstructions that may be preventing proper drainage.
  4. Check the dishwasher pump: If all the above steps fail, the issue may be with the dishwasher pump or motor. Contact a professional for assistance.

You can keep your Thermador dishwasher running smoothly and prevent draining issues. Don’t let a clogged drain hose ruin your day!

Positioning the Drain Hose

Proper positioning of the drain hose is an important consideration for proper functioning of a Thermador dishwasher. In this section, we’ll take a closer look at the two main aspects of effective drain hose positioning – the importance of high loop placement and the correct technique for securing the drain hose.

Drain hose positioning is vital for a properly working dishwasher. A 20 inch loop above the ground level is needed to keep water from flowing back into the appliance. To make this high loop:

  1. switch off the dishwasher and detach the hose.
  2. Empty any water left and have a look for clogs.
  3. Securely attach the high loop. No kinks should be in the hose.
  4. Reattach all parts and turn on the dishwasher.

An incorrectly placed or obstructed drain hose may let dirty water remain in the dishwasher after the cycle is done. This happens when the drainage pipe is set too low. To prevent such issues, read through your dishwasher’s owner manual and create a high-looping drainage pipe. Proper drain hose positioning is a must for a successful dishwasher!

Unclogging the Drain Hose

If you’re experiencing issues with your Thermador dishwasher not draining properly, it could be due to a clogged drain hose. In this section, we’ll explore how to unclog the drain hose by disconnecting it from the dishwasher and inspecting it for any visible obstructions. We’ll guide you through the steps you need to take to ensure a safe and thorough inspection, including:

  1. Turning off the power
  2. Turning off the water supply
  3. Draining any residual water
  4. Removing and tightening the hose as needed

Having drainage issues with your Thermador dishwasher? It’s key to know how to fix it! Following a structured process can help you find the problem quickly and easily.

First, turn off the power and water supply. Then, detach the drain hose from the appliance to your garbage disposal or sink. Empty any water from the hose into a pail or pan and check the hose for food particles or debris. If any clogs are present, use a brush or pipe cleaner to remove them. After that, replace and secure the drain hose before reconnecting it.

Preventative maintenance is also essential to avoid drainage complications. Cleaning monthly and searching for clogged filters or blocked hose positions regularly can stop drainage problems from happening.

It’s important to remember that chemical cleaners can harm parts of the dishwasher. Instead, stick to the above steps to troubleshoot without professional repair services.

By using these steps and regular preventative maintenance, you can keep your Thermador dishwasher running great and keep drainage problems away.

Preventative Maintenance

A well-maintained dishwasher extends its lifespan and keeps it functioning smoothly. In this section, we will explore the preventative maintenance steps that can keep your Thermador dishwasher from not draining. From monthly cleanings to accessing the bottom rack filter, we will cover the best practices to ensure your dishwasher’s filter is clean and functioning correctly.

Maintain your Thermador dishwasher for optimal performance. Make sure to clean it each month.

To clean the filter, start by taking out the bottom rack. Look for the filter assembly in the center of the tub. Lift it up with the handle. Remove any debris like food particles or mineral deposits with a sponge or brush. Rinse everything under running water. Put the filter back in place.

Don’t wait until the dishwasher stops draining. Be proactive! Each month, give your kitchen appliances some love. This way, you’ll have a working dishwasher when you need it most.

Say goodbye to dirty water and hello to a smoothly-draining Thermador dishwasher. Follow these maintenance tips and you’ll be good to go.


There you have it – the different causes and ways to prevent the Thermador dishwasher from not draining. By following these tips and making sure that you’re conducting regular maintenance on your dishwasher, you can avoid future repairs and enjoy clean, fully washed dishes every time.

Maintaining a functioning Thermador dishwasher means performing cycle completion checks, operating it properly and cleaning filters and hoses. Five steps to prevent clogs and draining issues:

  1. Check cycle completion before unloading dishes.
  2. Clean filters and hoses regularly.
  3. Position the drain hose high loop to avoid dirty water backflow.
  4. Follow manufacturer’s instructions and ensure water temp is above 120°F.
  5. Monthly maintenance of filter by removing debris from bottom rack access.

Inspecting for blockages, disconnecting power/water supplies, removing residual water and replacing visible obstructions before reconnecting are also needed for long-term success.

Following preventative measures like regular cleaning and check-ups safeguards against repair costs due to neglect or unseen damage. These steps will help you keep your dishwasher functioning well for years.

FAQs about Thermador Dishwasher Not Draining

What can be the cause of a Thermador dishwasher not draining properly?

A Thermador dishwasher may face draining problems due to various reasons such as clogged filters, obstructed drain hose, or even the presence of puddles of dirty water.

What are the ways to prevent blockages and facilitate drainage in a Thermador dishwasher?

To prevent blockages and ensure proper drainage, regular cleanings of the filter and positioning the drain hose properly with a high loop can be helpful. Monthly cleanings can also prevent clogs.

How can one fix an obstructed dishwasher drain hose causing draining issues?

The drain hose can be unclogged by turning off power and water supply, disconnecting the hose, draining any residual water, inspecting for clogs, removing visible obstructions, and replacing and tightening the hose.

Can clogged filters cause draining problems in a Thermador dishwasher, and how often should they be cleaned?

Yes, clogged filters can cause draining problems in a Thermador dishwasher. Monthly cleanings can prevent clogs and ensure proper drainage. Remove the bottom rack to access the filter at the bottom and clean it.

What should one do if they are unable to select a cycle in their Thermador dishwasher?

Check if the previous cycle has finished, and refer to the “Operating the Dishwasher” section of the owner’s manual for instructions. If needed, download the owner’s manual. The cycle time may also adjust during the wash cycle, and the dishwasher uses sensors to detect soil and adjust wash conditions.

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SmartHomeBit Staff