Whopping Bosch Dishwasher Error Fixing Guide

Any appliance can malfunction at any time, so as the dishwasher. Even Bosch dishwashers also stop working at times. The best thing about these dishwashers is that they display an error code any time when the machine detects a problem. They have a built-in diagnostic system. But what do these error codes mean? Many people are not aware of their meaning.

In this guide, we are going to cover all the error codes of the Bosch dishwasher. Some error codes are easy to fix, whereas some need a reliable technician to resolve the issue. The guide covers the solutions for an error in Bosch Dishwasher Logixx, Sensotronic, and other models.

Error Codes

Error E1

E1 error code

If you see an E1 error on the display screen, it means there are heating issues with your Bosch dishwasher. The problem is with the heater, which is not making the water hot. Other causes include a faulty temperature sensor or a water level sensor.


First of all, check the water level of your dishwasher. The heater will never turn on if the water level is low. Next, check the wires of the circuit of the heating element to make sure they are not broken. Most probably, the E1 error appears because of the burnt-out heater. And if this is the case, then the only solution is the replacement.

In case of a faulty temperature or water level sensor, both need replacement to avoid E1 error in the future.

Error E01

E01 error occurs when there is a problem with the control board of the dishwasher. Due to this error, your Bosch dishwasher will stop functioning.


First of all, restart the machine. If you get the error again, check the electric supply to make sure the voltage is not high or low. Also, check the wires connected to the dishwasher board. If the control board is faulty, then you need to buy a new one.

Error E2

E15 error in Bosch dishwasher

When the temperature sensor fails to work correctly, the E2 error occurs. Due to the faulty temperature sensor, the heating element operates at maximum power throughout the washing cycle. That changes the water temperature than the set one.


Wiring between the temperature sensor and the controller must be checked first. Make sure the connections are ok.

When the temperature sensor fails to give the signal to stop the heating element when the water temperature reaches the desired value, then there is a problem with the sensor, and it must be replaced. Or, if the master controller is faulty, you need a technician to look into the controller and replace it if required.

Error E02

The E02 error appears when there is a water heating problem caused due to some electronic issues. There might be a problem with the relay or circuit of the heating element.


Check out the wires to make sure there are no loose or burnt wires. If every wire is properly attached or in a working condition, check the relay of the heating element attached to the control board. You will need to replace the board if you find a faulty relay.

Error E04

E07 error code

If your Bosch dishwasher displays the E04 error code, there is a problem with the water flow sensor. Or sometimes, clogging in the spray nozzles stops or limits the flow of water that prevents the sensor from working properly, and causes the E4 error to appear on the display screen. The only reason for clogging is hard water.


First of all, clean the nozzles and check whether the E04 error still appears. If yes, then the only solution is to replace the water flow sensor.

Error E06

A broken or failed Aqua Sensor causes the E6 error. This sensor measures the water quality (turbidity) inside the dishwasher.


The only solution to fix the faulty aqua sensor is a replacement. But before buying and installing the new sensor, check the circuit of the sensor to find any burnt contacts. Sometimes, you only need to repair the burnt contacts to fix the error.

Error E07

E04 error code

E07 error means the hole designed to drain out the water is clogged due to food remains or foreign particles. Sometimes, misplacement of the dishes also shuts down the drainage hole.


You need to clean the hole and the filter by removing dirt or debris that does not allow the water to drain. But before cleaning the filter, make sure your Bosch dishwasher is free from water and dishes as well. After removing all the food debris, rinse the filter, reload the dishwasher, and start the fresh new cycle.

Error E09

It occurs when the dishwasher’s heating element breaks down. A burnt heater of the dishwasher shows the E09 error. Also, sometimes a broken temperature sensor or broken wires of the circuit of the heating element leads to E09 error.


First, look at the circuit of the heating element to make sure there are no broken wires. Then check the relay of the heating element attached to the board. But if there is a problem with the heater, you need to replace it along with the circulation pump.

Error E13

If you see an E13 error on the display, you have mistakenly connected your dishwasher to the hot water line. When the temperature sensor senses that the water is too hot to handle (above 75⁰C), it displays the E13 error.


Drain the hot water and fill your Bosch dishwasher with cold water.

Error E14

When the water flow sensor fails to work correctly, the machine displays the E14 error. Or, when the water intake valve gets out of order, you see the E14 error.


Checking the wiring and contacts of the sensor should be the first step. Next, check the flow sensor. If it is out of order, replacement is the only solution. Also, check the water intake valve and its filter. Remove them and rinse with water. Or, if replacement is necessary, buy a new valve and install it.

Error E15

The water leakage problem causes the machine to show the E15 error. It means that the water is leaking into the base (tray) of the dishwasher. The anti-flood switch then activates, causing the machine to pump the water out. After pumping out the water, the dishwasher turns off automatically.


To solve this problem, first, check the water hoses and their poor connections to find the cause of water leakage. Next, look at the drainage system to remove any blockage. If all set, check the drain pump to find any leakage. If there is a leakage, replace the part. If not, check the water leakage sensor and change it if required. But before going to change the sensor, check the wires and contacts and repair them if needed.

Error E16

E16 error means that the water is not stopping and continuously filling up the tank. When there is a blockage in the water intake valve, it fails to close completely, resulting in too much water in the tank.


You can get rid of the E16 error by checking and cleaning the water inlet valve. Also, inspect the water level sensor and if it is faulty, buy a new one and install it.

Error E17

When the incoming water pressure gets high, the E17 error code pops up. The water inlet valve in the dishwasher closes when the machine gets a sufficient amount of water in the tank. But due to excessive water pressure, it fails to close, resulting in too much water in the tank. This extra water gain results in the E17 error.

Other causes include a faulty water level sensor or a broken water inlet valve.


To treat the water pressure problem, slightly close the water supply valve to reduce the water pressure when filling the dishwasher tank.

If the error remains, then you need to replace the level sensor or the water inlet valve.

Error E18

The E18 error appears when there is a water flow problem in the dishwasher. The error indicates that the level of water is too low inside the dishwasher. Or, when the water is not being pumped correctly, the E18 error displays on the screen.


First, check the water supply valve to make sure it is on. If the water is coming at a good flow rate, there might be a problem with the water inlet hose. If it is broken or damaged, replace it with a new one. If not, check the water level sensor or the filter in the water supply hose for clogging. Clean the filter or replace the water level sensor if damaged.

Error E19


If you get the E19 error, then it indicates an issue with the heat exchanger. The drain valve of the heat exchanger is not working.


Check the drain valve in the heat-exchange unit and replace it.

Error E20

The E20 error tells you that there is a problem with the circulation pump. When the circulation pump breaks down, the E20 error pops up on the display. Other causes of the E20 error include a clogged filter or a blocked pump impeller.


First of all, remove the filter and clean it to remove the clogged particles. Then rinse it with water. Also, check the pump impeller to remove any blockage.

If the error still exists, then the circulation pump is faulty that needs repairing or replacement. But before removing and replacing the pump and the heating element, make sure all the wires and connectors in the circuit are perfectly alright and properly connected.

Error E21

When there is a blockage in the circulation pump, the E21 error appears. That means, when the machine fails to drain the dirty water, you face the E21 error.


If the pump is blocked with dirt and foreign objects, remove them. If the impeller blades are jammed, make the blades clean or if they are damaged, replace the impeller with a new one. Also, a jammed rotor causes the E21 error to display on the screen. You can clean the rotor and apply grease to make it new and workable.

In addition, if the pumping mechanism is out of order, change it.

Error E22

The filter is blocked, or the drain pump is not working.


If the drain filter is clogged, remove the objects that are causing the blockage. In case of breakage or blockage in the drain hose, disconnect it and clean the hose or change it if required. Inspection of the drain pump is also necessary. If you find any blockage in the pump or its blades are not rotating properly because of dirt accumulation, remove them. Moreover, in case of leakage or breakage of the drain pump, change it.

Error E23

People see the E23 error code on the display when the dishwasher fails to drain the dirty water. Also, the E23 error indicates a problem with the control board.


First of all, tilt your machine at a 45-degree angle towards the right side to see water coming out of the dishwasher. If there is a leakage, a lot of water will come out of the machine. This shows that one of the nozzles or hoses has a leakage problem. Also, check the other parts for leakage.

In case of a water drainage problem, check the drain pump. It could be burnt out, or there are damaged wires or contacts in the circuit. To check the drain pump, use a multimeter and if it is faulty, replace it.

Also, in case of a faulty control board, you need to replace it.

Error E24

When there is a blockage in the drain hose or if it is bent, the machine displays the E24 error. Some other causes of the E24 error are the breakdown of the drainage pump or the sensor.


Inspect the drainage system first. Check the valves and make sure the filters are not blocked. Next, check the drain hose and the power of the drain pump. If there is any obstruction in the hose, clear it, and if not, check the drain pump’s power that must be equal to 120V.

If all set, you need to enter into the main controller. Here, you need to focus on the black and grey wires and check their resistance by disconnecting the connectors. The resistance value must be 89 ohms and 14 ohms on the grey and black wire, respectively. If not, replace the controller.

Error E25

The E25 error occurs when there is a blockage in the wastewater pump, the filter is clogged, or the pump impeller is jammed.


The first thing required to fix the E25 error is to check the drain filter and the pump impeller. Clean and rinse the filter and check the impeller to remove any blockage. If you fail to get rid of the error, proceed to the drain pump. Also, never forget to check and clean the drain hose.

Checking the pump using a multimeter is necessary. A faulty drain pump will give either more or fewer ohms value than the specified range of 100 to 300 ohms. If yes, change the drain pump.

Error E27

Low voltage supply from the mains is the real cause of E27 error. Your machine needs either 220 or 110 Volts to run, and when the incoming voltage drops, the machine shows the E27 error and stops functioning.


You can use a voltage regulator to connect the dishwasher to the electrical network. This will provide the required and stable voltage for the machine to function.

Error H01

H01 is not an error. The Bosch dishwasher allows you to set a timer for the delayed start of the washing cycle. So, here, H01 means that your dishwasher will start washing the dishes after 1 hour.


If you have mistakenly selected the delayed start option, then all you need is to reset the timer to H00. To do this, press the + or – button until you see the H00 code on the display screen.

Also read: 4 easy ways to fix Bosch dishwasher water tap error


  • Stephen Powers

    Appliance repair guy from Washington. I am majorly experienced in dishwashers, water filters and refrigerators, AMA on my twitter account.

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