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What Does the E25 Code on Your Thermador Dishwasher Mean-and How Can You Fix It?
A dishwasher is one of those modern kitchen appliances that we mostly take for granted until something goes wrong. If you’re seeing the dreaded E25 error code on your Thermador dishwasher, don’t freak out. This article will help show you what it means and will walk you through the steps to fix it.
What Does the E25 Error Code Mean?
The E25 error code in your Thermador dishwasher is associated with a fault in water drainage. It is an indication that there is some problem either with the drain pump or something blocks the water from being drained out. In this case, the dishwasher may also stop mid-cycle or fail to drain the water, leaving your dishes in murky water.
Knowing what this error code means is the first step. Now, let’s talk about what could be causing it.

Common Causes of the E25 Error Code
A few causes can pop up to trigger the E25 error code. Here are the most common culprits:
Clogged Drain Pump or Filter
Food debris, grease, and other particles often build up in the filter or pump, preventing water from draining effectively.
Obstructions in the Drain Hose
A kinked or blocked drain hose will impede free water flow out of the dishwasher.
Faulty Drain Pump or Impeller
If either the pump or the impeller of your system is malfunctioning, this might be a setback for the drainage mechanism.
Faulty Installation
For instance, an issue in the improper installation of the dishwasher where the hose is wrongly positioned might be a probable mistake.
Now that you understand why the error may occur, let’s delve into how it can be fixed.
How to Fix the E25 Error Code
Before getting started with troubleshooting, please ensure that your dishwasher is unplugged from its power supply for your safety. Once you’ve geared yourself up, here’s how you can get your dishwasher into an operational mode:
1. Drain Pump and Filter Cleaning
- Open the dishwasher and locate the filter, that is usually located at the bottom of the appliance.
- Remove and clean the filter by rinsing it under warm running water to remove all the debris.
- Next, check the blockages in the drain pump opening. Use a torch to see inside if something has stuck inside, such as pieces of glass, food, or even plastic pieces.
Pro Tip: A good way to know if the impeller in your pump might be clogged is if the pump resists a manual attempt at turning its impeller.
2. Check the Drain Hose
- You will be checking the drain hose for kinking and visible blockages.
- Disconnect the hose, which may require pliers, and rinse it with water to unclog it.
Note: When reconnecting the hose, ensure it is not kinked and is positioned correctly.

3. Test the Drain Pump
If cleaning doesn’t resolve the issue, the drain pump itself might be faulty.
- Use a multimeter to check the pump’s electrical continuity.
- If the reading indicates that the pump is faulty, then it may need to be replaced. Call a technician or refer to your dishwasher’s manual for instructions.
4. Installation Errors
If, after cleaning and checking, the problem persists, then your dishwasher may have been installed incorrectly.
- Ensure the drain hose is installed at the correct height (usually specified in the user manual) to avoid siphoning issues.
- If you’re not sure, hiring an experienced technician to reinstall the dishwasher may save you a lot of time and frustration.
When to Call a Professional
Although cleaning and inspecting the dishwasher can resolve the E25 error code most of the time, there are instances where calling a professional is the best thing to do:
- The problem is not resolved after troubleshooting
- There are unusual noises from the pump
- You’re not comfortable with electrical components
An expert technician will have the tools and expertise to locate the issue and fix it quickly.

How to Prevent the E25 Error Code in the Future
The best way to ensure that you will never see the E25 error code on your dishwasher ever again is by being proactive regarding maintenance. How you can avoid the drainage issues in the future includes:
- Cleaning of filter – regularly, i.e., every 1 to 2 weeks depending on the usage.
- Scrape food off plates before loading the dishes.
- Routinely check your drain hose and pump for blockages.
- Run a cleaning cycle with a dishwasher-safe cleaner every few months to break down grease and limescale buildup.
Conclusion
The E25 error code is a frustrating sign no one wants to see, but most of the time, it’s a fixable issue. With some simple troubleshooting like cleaning your filter and pump or inspecting the drain hose you can get your Thermador dishwasher back in working order.
Still having any issues or uncertain as to how to proceed? Do not hesitate to consult with a professional. Regular maintenance, with prompt repairs if needed, can help make this dishwasher last.