Finding a pool of standing water at the bottom of your Miele dishwasher after a cycle is a frustrating experience. This common issue not only leaves your dishes less than clean but also points to a drainage problem that needs attention. Fortunately, this is often a simple fix that doesn’t require a service call. Blockages in the filter or drain hose are the usual culprits. With a little bit of troubleshooting, you can get your high-performance appliance back in perfect working order.
This guide will provide clear, beginner-friendly instructions on how to drain a miele dishwasher, empowering you to solve the problem yourself.
A dishwasher that won’t drain properly can be frustrating, but the good news is that many drainage issues can be resolved quickly and easily with some basic know-how. Before calling for professional help, it’s worth taking a few minutes to understand what might be causing the problem and how you can address it on your own. By identifying and addressing common culprits, you can save both time and money while restoring your dishwasher to full functionality.
Causes of Poor Drainage
There are a few common causes for a dishwasher not draining properly, including:
- Clogged drain hose or air gap: Over time, food particles and debris can build up in the dishwasher’s drain hose or air gap. This can prevent water from being able to flow freely through the drainage system, causing it to back up into the dishwasher.
- Faulty drain pump: The drain pump is responsible for pushing water out of the dishwasher during the drainage cycle. If it becomes clogged or malfunctions, this can hinder proper drainage.
- Broken garbage disposal: Many dishwashers are connected to the garbage disposal unit in your sink. If your garbage disposal is broken or clogged, it can also affect the drainage of your dishwasher.
- Improper installation: If your dishwasher was not installed correctly, it may not be able to drain properly. This could be due to incorrect placement of the drain hose or a lack of proper leveling.
- Clogged sink drain: A clog in your sink’s drain can also lead to water backing up into the dishwasher. It is important to regularly clean out your sink’s drain and use a mesh strainer to prevent food debris from entering the pipes.
Step-by-Step Guide on How to Drain a Miele Dishwasher
Step 1: Cancel the Program and Disconnect Power
Before attempting any work, your first step is to ensure safety. If a wash cycle is in progress or has just finished, cancel it by pressing the “Start/Stop” button and then the “On/Off” button to power down the unit. For complete safety, disconnect the dishwasher from its power source entirely. You can either unplug it from the wall outlet if accessible or, more reliably, turn off the corresponding circuit breaker in your home’s electrical panel. This crucial step prevents any risk of electric shock while you work with water and internal components.
Step 2: Remove the Bottom Rack
With the power safely off, open the dishwasher door and slide the bottom rack completely out. This will give you clear access to the bottom of the dishwasher tub where the filter system and sump are located. You will likely see a significant amount of standing water. Use a small plastic cup or a ladle to bail out as much of this water as possible. Soak up the remaining puddles with old towels or a sponge. Removing the water now will make the next steps much cleaner and easier to manage.
Step 3: Clean the Filter Combination
At the bottom of the tub, you will find the Miele filter system. This combination is designed to trap food particles and prevent them from clogging the drain pump. To remove it, grasp the handle and turn it counter-clockwise to unlock the entire unit. Pull it straight up and out. This assembly consists of a coarse filter, a fine filter, and a microfilter. Separate the pieces and wash them thoroughly under warm running water. Use a soft brush to gently scrub away any stubborn debris or grease buildup before reassembling the filter.
Step 4: Check the Drain Pump for Obstructions
With the filter combination removed, you will now have access to the drain pump impeller, which is located in the sump area beneath where the filter sits. A small plastic clip or flap often covers the pump. Lift this cover to expose the small propeller-like blades of the impeller. Carefully check this area for any foreign objects that may have gotten past the filter, such as a piece of glass, a fruit pit, or a plastic shard. Use your fingers to ensure the impeller can spin freely. A blocked pump is a very common cause of drainage failure.
Step 5: Inspect the Drain Hose
The drain hose is the corrugated tube that carries wastewater from your dishwasher to the sink’s plumbing. First, check where the hose connects to the dishwasher to ensure it hasn’t come loose. Then, trace the hose to where it connects under your kitchen sink, typically to the garbage disposal or a dedicated sink drain port. Look for any sharp kinks or bends in the hose that could restrict water flow. A tightly kinked hose is a simple but frequent reason for a backup, so straightening it out can solve the problem instantly.
Step 6: Disconnect and Clear the Drain Hose
If you suspect a clog inside the drain hose, you’ll need to clear it. Place a bucket under the connection point at the sink to catch any trapped water. Use pliers to loosen the clamp holding the hose to the drain port and pull the hose off. Let any water from the hose drain into the bucket. To clear a blockage, you can blow through the hose or use a long, flexible brush (a drain snake) to push out any debris. Once clear, securely reattach the hose to the sink drain.
Step 7: Check the Sink Drain and Garbage Disposal
Sometimes the problem isn’t with the dishwasher at all, but with the plumbing it drains into. If you have a garbage disposal, ensure it is clear of any food waste. Run the disposal for a moment with cold water to clear it out. If your drain hose connects to a sink drain without a disposal, make sure that drain itself isn’t clogged. A slow-draining kitchen sink is a strong clue that the plumbing is the source of your dishwasher’s drainage issue.
Step 8: Reassemble and Run a Test Cycle
Once you have cleaned the filters, checked the pump, and inspected the drain hose, it is time to put everything back together. Securely lock the filter combination back into place by turning it clockwise. Place the bottom rack back inside the dishwasher. Restore power to the unit at the circuit breaker or by plugging it back in. To test your work, run a short “Rinse & Hold” cycle. Listen for the sound of the pump engaging and watch to see if the water drains out at the end of the cycle.
Frequently Asked Questions
Why Is There Standing Water in the Bottom of My Miele Dishwasher?
The most common reason for standing water is a blockage in the drainage system. This is typically caused by one of three things:
- Clogged filters at the bottom of the tub.
- An obstruction blocking the drain pump impeller.
- A kink or clog in the drain hose that runs to your sink’s plumbing.
Regularly cleaning the filters is the best way to prevent this issue.
How Often Should I Clean My Miele Dishwasher Filter?
Miele recommends checking and cleaning the filter combination regularly. For an average household, inspecting the filters once a month is a good practice. If you frequently wash dishes with heavy food soils or notice any decline in cleaning performance, you should check them more often. A clean filter is essential for both proper drainage and optimal cleaning results.
What Is the Flap Covering the Drain Pump?
That small flap is the non-return valve. Its purpose is to prevent dirty water from the sink drain from flowing back into the clean dishwasher. When you are inspecting the drain pump for blockages, you can lift this valve out of the way to access the pump impeller. Make sure it is properly seated back in place after your inspection.
Can I Use a Chemical Drain Cleaner in My Dishwasher?
No, you should never use harsh chemical drain cleaners like Drano in your Miele dishwasher. These corrosive chemicals can cause severe damage to the delicate plastic and rubber components of the dishwasher, including the hoses, seals, and the pump itself. This can lead to leaks and expensive repairs. Stick to manual cleaning methods for clearing clogs.
My Dishwasher Is Still Not Draining, What Do I Do Now?
If you have thoroughly cleaned the filters, confirmed the drain pump is clear, and verified the drain hose is not kinked or clogged, the issue may be more complex. The problem could be a faulty drain pump or an issue with the machine’s electronic controls. At this point, it is best to consult your Miele user manual or contact a certified Miele service technician for professional diagnosis and repair.
Conclusion
A dishwasher that won’t drain is a common household headache, but it’s one you can often solve yourself with a few simple checks. By systematically working through the filters, drain pump, and hoses, you can identify and clear the blockage that is causing the backup. Regular maintenance, especially cleaning the filter combination, is the best way to prevent future issues. Now that you have a clear understanding of how to drain miele dishwasher, you can confidently tackle this task and ensure your appliance continues to operate at its best for years to come.
