Bosch Dishwasher Error Codes Explained

Paradise Appliance
January 3, 2022
Dishwasher Repair

If you have a Bosch dishwasher and it’s showing an error code, you’re in the right place. When something is wrong with your Bosch dishwasher, the internal diagnostic system will display an error code, so you know what is wrong and what you need to do to fix it.

To help you understand what each error code means, we have put together this comprehensive guide. Simply find the error code that is displayed on your dishwasher display screen and then follow our instructions for how to remove the code.

This guide covers all most major Bosch dishwasher models, including:





















Error codes E1 or E2

These error codes indicate a problem with the temperature sensor or thermistor in your Bosch dishwasher. To fix the underlying issue, you will need to access the sensor by removing the front cover of the dishwasher and then testing it with a multimeter to ensure it has continuity. If it doesn’t, it will need to be replaced.

Error code E3

The E3 error code means that your dishwasher is unable to fill with water. To fix this problem, turn the water supply off and unplug your dishwasher from the power socket. You can then remove the water hose and check the water inlet valve to ensure it’s working correctly. If not, it will need to be replaced.

Error code E4

The E4 error code means that there’s a problem with the water flow sensor, most commonly caused by a build-up of calcium on the sensor wheel. When this occurs, you need to replace the water flow sensor.

Error code E5

The E5 error code is displayed when your Bosch dishwasher is filling up with too much water. The leading cause of this error code is a faulty float switch. The float switch is responsible for monitoring the volume of water in your dishwasher and when it deems there is enough water it stops more from coming in. 

If the float switch becomes faulty, too much water will get into the dishwasher and the E5 error code will appear. To fix the problem, first, try to reset the float switch by turning the dishwasher off and on. If that doesn’t work, you will need to test the switch with a multimeter. If the float switch doesn’t have continuity, the switch will need to be replaced.

Error code E6

The E6 error code indicates a problem with the aqua sensor. The purpose of the aqua sensor is to detect when the water is clean or dirty and it also controls the water turbidity in your dishwasher. If you get an E6 error code, turn your dishwasher off, locate the aqua sensor, and then check it with a multimeter. If the test shows the aqua sensor doesn’t have continuity, it will need to be replaced.

Error code E9

The E9 error code indicates a problem with the heating element in your dishwasher. When you get this error code, turn your dishwasher off, locate the heating element and check it for any signs of wear and tear. If there is no obvious damage to the element, remove it and test it with a multimeter to ensure it isn’t faulty. If faulty, it will need to be replaced before you can use your dishwasher again.

Error code E15

The E15 error code means your dishwasher is leaking water and the flood sensor has been activated. This problem is most commonly caused by one of the water hoses that is connected to your dishwasher not being properly attached which causes a leak to occur. 

To remove this error code, turn the power to your dishwasher off, pull it out from the wall, remove the side panels, and then investigate where the leak is occurring. Once you find the source of the leak, you will need to fix it and then check if the error code has gone.

Error code E22

The E22 error code means there is residual water in the sump. This is caused by a blocked filter in your dishwasher. To remove the error code, open your dishwasher up and locate the filter (it’s at the bottom of the dishwasher). Once located, remove it and give it a good clean before putting it back into the dishwasher. You can then check if the error code has gone.

Error codes E24 or E25

These error codes mean there is a problem with the drainage—most commonly it is clogged. The easiest way to solve this is to listen to your dishwasher when it is trying to drain. If the drain pump is working but not draining, then you’ll need to check the check valve to make sure something isn’t stuck in it. 

If the drain pump is making a humming noise, this means the drain pump impeller has probably been obstructed from being able to spin around, which means you’ll need to locate the drain pump and give it a good clean. Once cleaned, turn your dishwasher back on and check if the error code has gone.

Error code H24

The error code H24 stands for “24-hour delay,” To remove the error code, you need to turn your dishwasher off for 3-5 minutes and then turn it back on. Once you turn the power back on, press the start button for 10 seconds to reset the dishwasher. Your dishwasher should now work again.


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