If your Bosch dishwasher is displaying an E15 error code, it means your dishwasher has decided that there is a risk that it might leak due to too much water in the dishwasher.
When the control board receives a signal from the flood switch, it activates the water pump to drain water and then turns the dishwasher off.
The most common reasons for this happening include:
- A blocked filter
- A faulty leak sensor/switch
- A defective sprinkler
- A faulty water hose
- A defective tank
Bosch’s official advice for consumers when they see the E15 error code is to call a qualified technician, as it will probably require replacing a component to fix it. However, in this guide, we will talk you through some of the most common ways you can try to fix the error code yourself.
This guide covers all major Bosch dishwasher models, including:
Tilt Your Dishwasher
Before you check various components to find the cause of the problem, you can perform this simple function, which might help to remove the error code and drain your dishwasher.
All you need to do is:
- Turn the water and power off to your dishwasher.
- Pull your dishwasher out from the cabinet or wall.
- Tilt the dishwasher to a 45-degree angle, and secure it in place by placing something underneath it.
- In some cases, once you’ve tilted your dishwasher for some time, the error code will go away and the dishwasher will start draining again properly. This is because when it is tilted water flows away from the safety switch and your dishwasher stops thinking it is going to leak and so the switch resets.
- If the E15 error code has still been displayed, you will need to move on to the next step.
Check the Filter
The next step is to check the filter in your dishwasher and give it a good clean. When it gets dirty or filled with debris, it can stop your dishwasher from being able to drain properly. This then results in the E15 error code appearing on your Bosch dishwasher.
To check and clean the filter, you simply need to:
- Locate the water filter (it’s on the bottom of your dishwasher). To access it, you may need to remove the bottom cover if your dishwasher has one.
- Once located, twist the filter to dislodge it and then remove it. Sometimes the filter is made up of two parts that need to be removed separately.
- Once removed, use hot soapy water and a brush to give the filter a good clean. You can then dry it off and put it back into the dishwasher—making sure you put it back securely in the same position it previously was.
- Turn the dishwasher on and check if the problem has been solved. If not, move on to the next step.
Check the Leak Sensor
The next possible cause of the problem is a faulty leak sensor. This doesn’t happen very often, but just like any other dishwasher component, it can need to be replaced due to wear and tear or if it stops functioning correctly.
Here’s how to check the leak sensor:
- Turn the power off to the dishwasher.
- Locate the leak sensor (check your manual if necessary).
- Check the sensor for any sign of damage, and if you have a multimeter, you can remove the sensor and check it for continuity.
- If the sensor is damaged or doesn’t have continuity, it will need to be replaced. If it is fine, you can put it back into the dishwasher and move on to the next step.
- If you do replace the sensor, turn the dishwasher back on and test if the error code has gone. If not, move on to the next step.
Check the Dishwasher Tank
Another possible cause of the E15 error code appearing, or at least a contributing factor, is if your dishwasher tank is damaged and has a crack in it that could cause a leak to occur. To ensure the dishwasher tank is fine, give it a thorough inspection. If you find it is cracked or damaged, you’ll need to get a professional technician to help you fix it or consider buying a new dishwasher.
Check the Water Sprinkler
If the tank is fine, check the water sprinkler. The water sprinkler determines the pressure of the water when it enters the dishwasher tank. Sometimes it can split, which causes water to flow into the base of the dishwasher, causing the leak sensor to activate. You can check the water sprinkler by locating it and giving it a thorough check. If you find any damage, it will need to be replaced.
Check the Water Hoses
The final possible cause of the problem is faulty hoses. Sometimes the water hoses can get damaged, and this can cause water to flow incorrectly into the bottom of the dishwasher tray. To rule out a broken hose as the cause of the problem, give the water hoses a thorough check, and if damaged, replace them.