---
title: "Bosch Dishwasher Not Washing Cleaning"
canonical: "https://gadgetguides.org/bosch-dishwasher-not-washing-cleaning/"
author: "Arian"
published: "2026-09-12T20:49:10+00:00"
modified: "2026-09-12T20:49:10+00:00"
language: "en-US"
site: "Gadget Guides"
description: "Your Bosch dishwasher leaves food on the dishes. Glasses come out cloudy. Maybe there is water sitting in the bottom after the cycle. If you are dealing…"
categories: "Help Guide"
attribution: "Gadget Guides (https://gadgetguides.org/)"
---

# Bosch Dishwasher Not Washing Cleaning

Your Bosch dishwasher leaves food on the dishes. Glasses come out cloudy. Maybe there is water sitting in the bottom after the cycle.

 

If you are dealing with a Bosch dishwasher not washing cleaning properly, you are not alone. It is the most common complaint about these otherwise reliable machines.

 

The good news is that roughly 80 percent of cleaning issues trace back to just three things: a clogged filter, blocked spray arms, or incorrect rinse aid settings. As of 2026, Bosch offers a three-stage filtration system that requires occasional manual cleaning. Most owners do not realize this.

 

Let us walk through what is actually going wrong based on what you see.

 

![Bosch Dishwasher Not Washing Cleaning](https://gadgetguides.org/wp-content/uploads/2026/09/bosch-dishwasher-not-washing-cleaning-mtyuygnl.webp)

 

Image source: Bing (Web (fair-use with source credit))

 

## Quick Answer

 

Check the filter first. Remove it and rinse under hot water. Clean the spray arm holes with a toothpick.

 

Adjust the rinse aid setting to 4. Run a Heavy cycle with a dishwasher cleaner. This fixes most problems.

 

If dishes stay dirty, check your water temperature. It must reach at least 120°F. If water sits at the bottom, inspect the drain hose for kinks.

 

If an error code flashes, look it up in your manual. Most Bosch issues are simple to fix yourself.

 

## The Three Things Most People Miss

 

![Bosch 3-stage filtration system](https://gadgetguides.org/wp-content/uploads/2026/09/bosch-3-stage-filtration-system-mtyuyhib.webp)

 

Image source: Bing (Web (fair-use with source credit))

 

Before you dig into error codes or worry about the control board, check the three most overlooked items. Skip this step and you might waste an hour on the wrong fix.

 

**The filter.** Bosch uses a manual-clean filter system. It sits at the bottom of the tub under the lower spray arm. Twist it counterclockwise and lift it out.

 

Rinse it under hot water. Use a soft brush to remove debris caught in the fine mesh screen. Manufacturer specifications recommend cleaning this every one to three months.

 

If you have never cleaned it, that is likely your issue right there.

 

**The spray arms.** Water has to reach your dishes. If the spray arm holes are blocked, nothing gets clean. Remove the upper spray arm by unscrewing the retaining nut.

 

Pull the lower spray arm straight up. Hold each arm under running water and poke any clogged holes with a toothpick or paper clip. The arms should spin freely when you put them back.

 

If they wobble or stick, you have found the problem.

 

**The rinse aid setting.** This sounds minor, but it matters. Bosch dishwashers use rinse aid to help water sheet off dishes. The setting goes from 1 to 6.

 

Most homes need a setting of 4 or 5. If it is set too low, water beads up and leaves spots. If it is set too high, you get foam or residue.

 

Open the dispenser door and turn the dial to match your water hardness. You can check your local water hardness online or call your utility company.

 

These three checks solve the majority of "not washing" complaints. Do them before anything else.

 

## Symptom 1: Dishes Still Dirty After a Full Cycle

 

![Bosch spray arm design](https://gadgetguides.org/wp-content/uploads/2026/09/bosch-spray-arm-design-mtyuyiss.webp)

 

Image source: Bing (Web (fair-use with source credit))

 

You load the dishwasher. You run a full cycle. You open the door and food is still stuck to the plates.

 

Let us narrow this down.

 

**If only the top rack is dirty:** The upper spray arm might not be getting water. Remove it and check for blockages inside the arm. Also make sure the water supply tube behind the upper rack is properly connected.

 

A misaligned tube stops water flow completely.

 

**If only the bottom rack is dirty:** The lower spray arm could be blocked. Check the holes. Also check that large items like cutting boards or baking sheets are not blocking the arm from spinning.

 

A lasagna pan sticking out too far can stop the arm cold.

 

**If everything is dirty:** This points to a bigger issue. First, confirm you are using enough detergent. Bosch machines work best with detergent in both the main compartment and the pre-wash compartment.

 

Most pods only release detergent in the main wash. If you use pods, toss a teaspoon of powder into the pre-wash compartment as well. Aggregate user reviews report this fixes the problem for many people.

 

**If glasses come out cloudy:** This is hard water scaling mixed with food residue. Adjust your rinse aid setting higher. Run a cleaning cycle with a dishwasher cleaner once a month.

 

If you have very hard water above 7 grains per gallon, you may need to refill the built-in water softener with salt. Check your manual for the softener salt compartment location.

 

**If detergent residue stays on dishes:** Your water might be too cold. Bosch recommends incoming water at 120°F minimum. If your water heater is set lower, the detergent will not dissolve properly.

 

Run the hot water at your kitchen sink before starting the dishwasher. This ensures hot water reaches the machine immediately.

 

## Symptom 2: Water Standing in the Bottom

 

You open the door after a cycle and there is still water in the sump area. A little water is normal. Standing water deep enough to cover the filter is not.

 

**If the filter looks clean but water remains:** Check the drain hose. It runs from the dishwasher to your sink drain or garbage disposal. If it is kinked or pinched behind the machine, water cannot leave.

 

Pull the dishwasher out carefully and inspect the hose. Straighten any kinks.

 

**If the drain hose is clear:** The drain pump might have debris. Small items like olive pits, broken glass, or plastic lids can jam the pump impeller. You can access the pump through the sump area.

 

Remove the filter. Reach into the sump with a flashlight and look for foreign objects. Remove them with needle-nose pliers.

 

**If water is in the base pan:** This triggers error code E:15 on most Bosch models. It means water has leaked past the tub and is sitting in the plastic base underneath. This is serious.

 

Unplug the dishwasher or flip the breaker immediately. Water in the base can damage the electronics and cause electrical shock. You need to tilt the machine forward and dry out the base pan.

 

If the leak continues, call a service technician.

 

**If no water drains at all:** The drain pump motor may have failed. Listen for a humming sound during the drain cycle. If the pump hums but nothing moves, the pump is likely stuck or dead.

 

This usually requires a replacement part. The pump itself costs around $60 to $100. Labor adds more.

 

## Symptom 3: Error Code on the Display

 

Your Bosch dishwasher has a digital display or a series of flashing lights. It is trying to tell you something. Here is what the most common codes mean and what to do about them.

 

| Error Code | Meaning | What to Do |
| --- | --- | --- |
| E:09 | Heating element failure | Call a technician. This requires electrical testing. |
| E:15 | Water in the base pan | Unplug the machine. Dry the base pan. Check for leaks. |
| E:22 | Blocked drain pump | Clean the sump and drain pump area. |
| E:24 | Drain hose issue | Check for kinks or clogs in the drain line. |
| E:25 | Drain pump motor failure | Pump needs replacement. |
| E:27 | Water inlet problem | Check that the water supply valve is fully open. |

 

**If the code is E:15:** This is the most common error code on Bosch dishwashers. It does not always mean a major leak. Sometimes a small spill during loading triggers the sensor.

 

Unplug it for 15 minutes and plug it back in. The code may clear. If it comes back, you have a real leak.

 

**If no code shows but the dishwasher stops mid-cycle:** The PrecisionWash sensor may be confused. This sensor measures soil levels and adjusts the cycle. If it gets dirty or blocked, it can stall.

 

Run a cleaning cycle with a dishwasher cleaner. This often resets the sensor.

 

**If lights flash in a pattern:** Check your manual. Bosch uses different flash patterns for different models. Count the flashes and look them up online or in your manual.

 

## When to Call a Pro vs. When to Keep Digging

 

Some problems you can fix in ten minutes. Others require a technician. Here is how to decide.

 

**Fix it yourself if:**

 

- The filter is dirty. Clean it.
- Spray arm holes are clogged. Clear them.
- The drain hose is kinked. Straighten it.
- Rinse aid needs adjusting. Turn the dial.
- An E:22 code appears. Clean the sump.

 

**Call a pro if:**

 

- Error code E:09 appears. The heating element needs testing.
- Error code E:15 keeps returning after clearing the base pan.
- Machine leaks from underneath while running.
- No power reaches the control panel.
- The pump hums but does not spin after cleaning the debris.

 

Bosch service technicians charge around $100 to $150 for a diagnosis call. Repair costs vary by part. A new drain pump runs about $60 to $100 plus labor.

 

A control board replacement can cost $200 to $400. Weigh that against the age of your machine. If your Bosch is over 10 years old, replacement might make more sense than a major repair.

 

## Common Mistakes That Waste Your Time

 

People make the same errors over and over. Avoid these.

 

**Using too much detergent.** More soap does not mean cleaner dishes. Excess detergent leaves residue and can cause film. Use the amount recommended on the package.

 

For hard water, use a little less.

 

**Loading dishes incorrectly.** Bowls and pots can block the spray arms. Make sure nothing sticks up above the tines. Place larger items on the bottom rack.

 

Put smaller items on the top rack. Angle plates downward so water drains off.

 

**Ignoring the pre-wash compartment.** Most pods go in the main wash compartment only. The pre-wash compartment stays empty. This means the pre-wash phase gets no detergent.

 

Add a teaspoon of powder or liquid to the pre-wash compartment. Your dishes will come out cleaner.

 

**Skipping filter cleaning.** You should clean the filter every one to three months. Mark it on your calendar. A clogged filter is the number one reason Bosch dishwashers stop cleaning properly.

 

**Running cold water cycles.** The dishwasher needs hot water to dissolve detergent. If you have not run hot water at the sink first, the machine fills with cold water sitting in the pipes. Run the kitchen faucet until the water feels hot before starting the cycle.

 

## Frequently Asked Questions

 

### Why is my Bosch dishwasher not cleaning the top rack?

 

The upper spray arm likely has blocked holes or the water supply tube is misaligned. Remove the upper arm and clean the holes with a toothpick. Make sure the tube behind the upper rack is fully connected and not kinked.

 

### How often should I clean the Bosch dishwasher filter?

 

Clean it every one to three months. If you run the dishwasher daily, clean it monthly. If you rinse dishes before loading, you can stretch it to three months.

 

A dirty filter causes poor cleaning and standing water.

 

### What does error code E:15 mean on a Bosch dishwasher?

 

It means water has leaked into the base pan underneath the dishwasher. Unplug the machine immediately. Tilt it forward to drain the base pan.

 

Dry the area with a towel. Plug it back in. If the code returns, you have a leak that needs professional repair.

 

### Should I use pods or powder in my Bosch dishwasher?

 

Both work, but powder gives you more control. Pods are convenient but often skip the pre-wash phase. If you use pods, add a teaspoon of powder to the pre-wash compartment.

 

This ensures the pre-wash has detergent.

 

### Why does my Bosch dishwasher leave white residue on glasses?

 

White residue is hard water scaling. Increase the rinse aid setting. Run a cleaning cycle with a dishwasher cleaner monthly.

 

If your water is very hard, refill the built-in water softener with salt. Check your manual for the correct location.

 

### How do I reset my Bosch dishwasher after an error code?

 

Unplug the dishwasher or flip the circuit breaker off. Wait 5 to 10 minutes. Plug it back in or flip the breaker on.

 

This clears temporary errors. If the code returns, the problem is not a glitch.