What does Bosch Dishwasher Error Code E21 mean? This problem indicates the problem with the wash motor or circulation pump. You can follow our repair guide to troubleshoot and diagnose the problem yourself. This will help you in saving a ton of money. But, in severe cases, we recommend taking the help of an expert as a problem can be complicated and requires far more expertise in the field.
How To Fix Bosch Dishwasher Error Code E21
The main function of the circulation pump is to push the water through the spray arm so that the dishwasher can effectively clean the dishes. If the circulation pump is damaged or there are some particles stuck into it, then it cannot work efficiently, which can result in the E21 error. You need to clear debris that may have formed inside the pump chamber. It is important to remove the blockage to fix this issue. You can also check E20 Error Here.
In most cases, this is the cause of the problem, and it can be easily corrected by installing a wash motor. If the drain valve is clogged, then it needs to be cleaned. If it is jammed open, the problem is the same. Sometimes, the problem with the motor is with the flow of water. In other cases, the problem may be the condition of the pump. The pump may be faulty due to the water flowing through the motor.
Reasons for E21 Error
When you are faced with Bosch Dishwasher Error Code E21, the dishwasher won’t work, and it can be very frustrating for you. The wash programs will stop midway, and then you need to remove all dirty dishes and water. So, it is better to reset this error quickly.
- The pump is clogged. The blockage will stop the flow of water, and hence the draining will stop. When this happens, the control panel will show the E21 Error.
- Pump’s Impeller is damaged or worn out due to excessive usage. You also need to check for blockage here as well.
- The rotor is faulty. Also, the rotor may not be rotating at the proper speed. Check if there is any debris stuck in it.
Sometimes, the control panel wrongly sends the E21 error. So, to reset it do the following steps.
- Witch off the Power supply.
- Wait for 10-15 minutes.
- Restart the Dishwasher.
If you are still getting the Bosch dishwasher E21 error code, then you need to check for any stuck debris in the circulation pump and drain hose.
Fix Clogged Pump
You need to inspect the pump for any sign of blockage. Please remember that to access the pump, you need to dismantle the dishwasher. So, only do this step when it is necessary to do it. You can also try by cleaning the dustbin and then restart the dishwasher. Also, clean the filter. In many cases, it can solve the clogging issue.
If you still face the issue, then you have to remove the circulation pump. It is normally located near the circulation area. Clean the pump and remove any dirt debris particles that are stuck inside it. After this step, place the pump again and start the dishwasher.
When removing the recirculation pump, if you observe that the rotor impeller is worn out, then it needs to be removed. The impeller can be easily removed from the Bosch dishwasher.
The impeller blades are often not affected at all, but they are covered with a whole skein of certain threads and hair combined with traces of compressed foods. If you see, this then you need to clean the rotor. Now, safely start the dishwasher, and hopefully, now error code e21 is reset.
Rotor is Jammed
Due to lack of greasing, the rotor will not revolve correctly and may become faulty as time passes by. This can result in Error code E21. So, how to fix the Jammed Rotor? You can follow the below steps:
- Use a special grease for rotor blades. You can buy it in supply stores or online.
- Power off the Dishwasher.
- Remove the impeller from the recirculation pump.
- Apply the grease as given in the instruction. You can find it in the grease’s bottle or manufacture website.
- Place the impeller carefully.
- Start the dishwasher.
After doing all the above inspection and fixing, we are sure that the dishwasher will work properly. Please do comments with your questions and we will be happy to answer them.