H 01 Bosch Dishwasher Error Codes: 15 Issues Fixed

Ever wondered about the ultimate kitchen assistant? Look no further than Bosch dishwashers. With their sleek design and advanced features, cooktops and cookware redefine convenience and efficiency in the modern kitchen. From sparkling clean dishes to whisper-quiet operation, Bosch dishwashers set a new standard for home appliances, power and electronics.

Bosch built its dishwashers for utmost performance, but that doesn’t mean they won’t throw errors occasionally. That’s why it’s important for an appliance technician to learn about Bosch dishwasher troubleshooting error codes, understand what they mean, and know how to fix them.

Bosch dishwasher error codes for electronics include E1, E2, E3, E5, E8, E12, E13, E14, E15, E16 and E17, E18, E19, E21, E22, E23, E24, and E25. Each code in electronics means a unique error or a set of issues thereof, with a larger percentage easier to fix on your own.

In this guide, I’ll highlight all the Bosch dishwasher troubleshooting error codes, highlight the probable cause, and show exactly how to clear each error.

Let’s get to it.

bosch dishwasher troubleshooting error codes

Bosch Dishwasher Troubleshooting Error Codes (15 Errors Fixed)

The following table shows a quick summary of the Bosch dishwasher error codes, what they mean, and quick fix.

 Error CodeProbable Cause  Quick DIY Fix
1.E1There’s a problem with the heating elementEnsure all connections are clean and secure. Clean the drain hose if clogged. Or replace heating element if faulty
2.E2Temperature sensor not working properlyGet a new thermistor for replacement if the current one has failed.///
3.E3Dishwasher not filling with waterInspect the water supply and make sure the water inlet valve is connected. 
4E5The unit is overfilling with water because of a faulty float switch.Get a new float switch for replacement to clear the error.
5.E8Your Bosch dishwasher has low water level in the heater. ///Clean the filter. Check the solenoid valve for damages and replace if faulty. ///
6.E12There’s limescale buildup in the heat pumpDescale the unit on a regular basis for proper functionality.
7.E13Water temperature in the dishwasher is too hot for the unit. Contact Bosch customer support for assistance.Reset the dishwasher for seconds to see if doing so fixes the problem. Otherwise replace the temperature sensor.
8.E14 & E18The unit can’t detect the flow of waterReplace the water inlet valve
9.E15There’s water stuck in the dishwasher’s baseUse the 45-degree tilt method to remove water from the base of the unit in seconds.
10.E16 & E17Water flowing into the unit is out of control and can cause flooding. Contact Bosch customer support for assistance. The intake valve has broken down.Try resetting the dishwasher for assistance, see if that can help solve the problem. Remove excess foam from the tank. Clean the filling valve.
11.E19The internal valve is malfunctioningYou should schedule a call with an expert technician for a quick fix and assistance.
12.E21, E23 & 25Bosch dishwasher drain pump not functioning properlyClean the pump with assistance so that it doesn’t have any material causing clogs.
14.E22Dishwasher filter blockedAccess the dishwasher filter and clean the foreign particles causing blockages with assistance.
15.E24Bosch dishwasher isn’t draining properlyClean the unit’s drain filter

1. Error Code E1

Error code E1 on Bosch means there’s a problem with the heating element. /// The unit has sensed burn contacts or damages caused by hard water deposits. /// 

  • First, check to make sure that all connections are clean and secured in place. If you notice that one of the components that connects to the heating elements is faulty, have it replaced with assistance.

  • Inspect the hoses, branch pipes, and assistance for clogs and clean the blockages if any.

  • Use a multimeter with continuity test to test for continuity of the heating element.

AstroAI Multimeter

Replace the dishwasher’s heating element if it doesn’t have continuity and assistance. 

2. Error Code E2

Your Bosch dishwasher features multiple sensors, and each has a special function that contributes to the overall performance of the device. A thermistor is one of these.

The purpose of the thermistor is to regulate temperature so that the unit works well, especially when running long Bosch dishwasher cycles.

You will see the E2 error if the thermistor fails to work properly. It could be there are broken wires, or the thermistor is faulty causing the E2 error to appear on the control panel. 

  • Turn off the water supply to the unit and disconnect it from the power source

  • Remove the cover and kick plate to access the thermistor connector 

  • Look for the thermostat in the block heating element

  • Use a multimeter to test the thermistor for continuity, making sure you measure its resistance at room temperature

  • Insert the thermistor in boiled water and test the resistance further

If the thermistor is in good condition, the resistance should between 20 and 60 KOHM. Anything outside this range means the error will keep recurring. In this case, you should have the thermistor replaced with a new one. 

3. Error Code E3

The error code E3 means your Bosch dishwasher can’t fill with water.

Check if you’ve fully opened the dishwasher’s water supply. Turn it on if it’s off.


  • Turn off the water supply

  • Unplug the dishwasher from the power source

  • Remove the fill line to verify that the water inlet is in good condition and connected.

If everything is in order, but the error code still shows on your unit’s control panel, it means the water inlet valve is faulty and needs a replacement.

4. Error Code E5

The Bosch dishwasher’s E5 error code indicates that the appliance is overfilling with water. A fault in the unit’s float switch is the most common cause.

This switch is designed to float with the water level as it rises, indicating when the volume is nearing full. The dishwasher understands that it will stop filling with water when the switch reaches a specific point.

If the float switch malfunctions, it fails to indicate when the water level has reached its maximum limit. As a result, the dishwasher displays the E5 error number to alert you that the faulty switch has a problem.

Replace the switch to fix this problem and clear the error.

5. Error Code E8

If your Bosch dishwashers throws the E8 error, it means your unit has an issue with a low water level in the heater. It likely that inlet valve is faulty, making it impossible for the unit to fill with water. 

To clear the E8 error code from your Bosch dishwasher screen:

  • Inspect the solenoid valve flow meter for damages

  • Pull out the fill hose

  • Remove the small filter in the valve and inspect for blockages 

If the filter is in good condition, it means the solenoid valve is faulty and need replacing. Get the solenoid kit compatible with Boschfor replacement.

It’s important to use a multimeter to check the valve for faults. 

6. Error Code E12

The error code E12 isn’t something you’ll see often, but it can interfere with the optimal performance of your dishwasher. If you see this error on the control panel, it means the unit has detected limescale build up.

To fix this error and to make sure it never appears again, you need to descale your unit on a regular basis.

Bosch recommends using this descaler.

bosch dishwasher descaler

Also, make sure you clean the dishwasher regularly to keep it free of grease, protein, and start residue.

7. Error Code E13

The E13 error code is a warning that the temperature of the water is too hot, which might potentially harm some elements of your dishwasher.

In general, the water temperature should not be greater than 75 degrees C. If the water temperature surpasses this threshold, then the error code might occur, and there’s a potential that your dishwasher will cease operating.

Reset your dishwasher to see if the problem fixes itself. To do this:

  • Disconnect your dishwasher form the power source

  • Wait 10 to 15 minutes to allow your dishwasher to reset

If the area code doesn’t appear on the screen once you turn back the unit on, it’s likely the problem is fixed. Otherwise, you will have to replace the temperature sensor.

8. Error Code E14 & E18

If you see the error code E14 on the Bosch dishwasher, it means the unit can’t detect water flow in the dishwasher. More often than not, the cause of the problem is a malfunctioning control module or a faulty water intake valve.

You can fix this error by replacing the current water inlet valve with a new one.

9. Error Code E15

If your Bosch dishwasher displays the trouble number E15, it means that water is present in the dishwasher’s base.

The first fix is to try to clear the code. Doing so helps, especially if you feel like the problem may have occurred because of a glitch in the control board. Also, doing a hard reset can help to clear the error and get the dishwasher working normally again. 

If the error code reappears, you will need to empty the water in the base of the dishwasher. Tilt the dishwasher about 45 degrees backwards to empty the water and clear the error. Reset the level safety switch after draining the water from the base.

Check out our troubleshooting guide on Bosch Dishwasher E15 for more information.

10. Error Code E16 & E17

If you see this error code, it means that water pouring into the machine is out of control and there is a potential of leaking.

This issue occurs most frequently when garbage containing tap water reaches the inlet valve and prevents it from shutting. As such, water continues to leak through even after you shut down the dishwasher.

Turn off the dishwasher and disconnect it from the power source for 10 to 15 minutes. If the reset doesn’t clear the code:

  • Inspect the tank to make sure it does not contain an excessive amount of foam.

  • Inspect and clean the filling valve because the typical cause of E16 is a clogged valve.

  • Examine the water sensor. If the system displays the code although there is no water in the tray, the sensor is faulty and you should replace it.

11. Error Code E19

If the trouble codes E19 or F19 appear on the appliance’s display, it means that the dispenser or an internal valve is malfunctioning.

We advise against attempting to handle the issue on your own at home owing to health and safety concerns.

Please turn off the water tap and the appliance. Schedule a visit from an engineer to have a professional resolve the issue.

12. Error Code E21 & E23

The E21 Error number indicates that your machine’s main control unit has detected that the drain pump is not functioning properly. And there might be other causes for this.

The E21 Error may appear on your machine’s display if the pump has clogs, or if the impeller is unable to rotate properly for the same reason.

Access the drain filter and rinse it thoroughly. Check the impeller and its blades and clean then.

13. Error Code E22

The E22 code is an indication that your dishwasher’s filter is blocked. The best solution is to clean the filters to remove the blockages.

14. Error Code E24

The Bosch error code E22 indicates that the Bosch dishwasher is not draining correctly owing to a clogged drain filter.

Check to make sure the intake hose is not broken or kinked. Also, clean the drain filter to remove the clogging.

bosch error code e15

Frequently Asked Questions

1. Is H01 a Bosch Dishwasher Error Code?

The H01 on a Bosch dishwasher isn’t an error code. It’s just a code, which indicates that you’ve set your dishwasher to delayed start mode. The unit will be ready to use one or two hours later.

2. How Can I Clear Error Code on My Bosch Dishwasher?

You can clear the error codes from your Bosch dishwasher by identifying the kind of error and fixing it based on the information we’ve provided in this guide.

3. How Should I Reset Bosch Dishwasher?

You can reset the dishwasher by disconnecting it from the power source and waiting for 10 to 15 minutes for the unit to reset fully.


That’s it on Bosch dishwasher troubleshooting codes I hope this list has helped you to know the most common error codes that you’ll more than likely see on the dishwasher as well as how to fix them.

Encountering an error code H01 can be frustrating, but fear not – we’ve got you covered with troubleshooting tips and solutions. Whether it’s understanding the root cause or finding ways to resolve the issue swiftly, this post will equip you with the knowledge needed to tackle Error Code H01 like a pro.

Deciphering Error H01

When you see the H01 error code on your Bosch appliance, it usually indicates a problem with the heating element. This error specifically relates to a malfunction in the heating system, which can affect various appliances such as dishwashers or washing machines.

The H01 error code typically means that the appliance is unable to reach or maintain the required temperature during operation. For instance, if it’s a dishwasher, this could lead to dishes not being cleaned properly due to inadequate water temperature. In a washing machine context, clothes might not be washed effectively because of insufficient heat for proper cleaning.

This issue can arise from different factors affecting the heating component of an appliance.

One common cause of the H01 error code is a faulty heating element within the appliance. Over time and use, these elements can degrade or burn out entirely, leading to inadequate heating performance and triggering this specific error code.

Another potential reason for encountering this error is related to issues with temperature sensors or thermostat malfunctions. If these components fail to accurately detect and regulate temperatures within an appliance, it can result in improper functioning and trigger an H01 error.

Furthermore, problems with wiring connections or electrical supply issues can also lead to this type of error. Any disruption in power supply or damaged wiring connected to the heating system may cause irregularities in heat distribution and ultimately prompt an H01 fault notification on your Bosch appliance.

Troubleshooting Steps

Water Supply Check

If your Bosch dishwasher is displaying the error code H01, it’s crucial to check the water supply. Start by ensuring that the water inlet valve is fully open and that there are no kinks in the inlet hose. Next, examine the water pressure to ensure it meets the manufacturer’s recommendations. In some cases, low water pressure can trigger the H01 error. If everything seems fine with the water supply, move on to inspecting other potential causes of this error.

It’s important to note that a restricted or inadequate water supply can lead to various issues in a dishwasher, including incomplete cleaning and drying cycles as well as triggering error codes like H01. Therefore, always double-check this aspect before moving on to other troubleshooting steps.

Drain Hose Inspection

Another critical step in troubleshooting an H01 error on your Bosch dishwasher involves inspecting the drain hose. Begin by examining for any kinks or clogs that might be obstructing proper drainage from your dishwasher. Clear any debris or blockages from both ends of the drain hose and ensure it is properly connected without any damage or leaks. Sometimes, a blocked or improperly installed drain hose can cause drainage problems leading to errors like H01.

A clean and unobstructed drain hose ensures efficient drainage from your dishwasher after each cycle, preventing standing water and potential errors like H01 from occurring.

Filter Cleaning

In addition to checking the water supply and drain hose, regularly cleaning and maintaining your dishwasher’s filter is essential for preventing errors such as H01. Remove the filter assembly according to your appliance’s user manual and carefully clean away any food particles or debris trapped within it. Thoroughly rinse off all residue before reinstalling it back into place.

Regular maintenance of your dishwasher’s filter not only helps prevent errors but also ensures optimal cleaning performance for every wash cycle.

Timer Programming

Setting the Timer

Setting the timer on your H01 Bosch appliance is a straightforward process. First, locate the control panel on your appliance. Then, press the “Timer” button to activate the timer function.

Next, use the arrow buttons to adjust the time according to your needs. Once you’ve set the desired time, press “OK” or “Set” to confirm and activate the timer. After this simple process, your appliance will start operating based on your programmed schedule.

It’s important to consult your user manual for specific instructions related to setting timers for different functions of your H01 Bosch appliance. This can help ensure that you are utilizing all available features effectively and efficiently.

Timer Issues

Sometimes, despite following all instructions carefully, you may encounter issues with setting or adjusting the timer on your H01 Bosch appliance. One common issue could be related to power interruptions resetting the timer function.

In such cases, it’s advisable to check if there are any power disruptions in your area that might have affected the programming of your appliance’s timer. Ensuring a stable power supply and using surge protectors can help prevent these interruptions from affecting your programmed settings.

Another possible issue could be related to software updates or malfunctions within the appliance itself. If you’re experiencing persistent problems with setting or maintaining programmed timers, contacting Bosch customer support for troubleshooting assistance may be necessary.

Maintenance Routines

Spray Arm Care

To maintain the efficiency of your H01 Bosch dishwasher, it’s crucial to regularly inspect and clean the spray arms. These components are responsible for distributing water throughout the dishwasher during a cycle. Over time, food particles and mineral deposits can clog the spray arm nozzles, leading to poor cleaning performance.

To clean the spray arms, start by removing them from the dishwasher. Then, rinse them under running water to dislodge any debris stuck in the nozzles. Use a small brush or toothpick to carefully remove any stubborn particles that may be blocking the openings. Once cleaned, reattach the spray arms securely back into place in the dishwasher.

Regularly performing this maintenance task helps ensure that water can flow freely through all parts of the spray arms, allowing for optimal cleaning performance during each wash cycle.

  • Rinse spray arms under running water

  • Use a small brush or toothpick to remove stubborn particles

  • Reattach securely after cleaning

Heating Element Check

The heating element is a vital component of your H01 Bosch dishwasher as it is responsible for heating up water during washing cycles and aiding in drying dishes at higher temperatures. Regularly checking on this element ensures that it continues to function effectively over time.

Start by disconnecting your dishwasher from its power source before attempting any inspection or maintenance tasks involving electrical components like the heating element. Once disconnected, visually inspect the heating element for any signs of damage such as discoloration or corrosion.

You can use a multimeter to test for continuity across its terminals if you suspect an issue with its functionality. If you notice any damage or irregularities during your inspection, it’s essential to replace the heating element promptly to maintain optimal performance of your H01 Bosch dishwasher.

Fixing Error H01

To fix the H01 Bosch error, try resetting the dishwasher. Start by turning off the appliance and unplugging it from the power source for a few minutes. This action allows the dishwasher to reset itself and clear any temporary glitches that may have caused the H01 error.

After unplugging, plug in your Bosch dishwasher again. Then, turn it on and check if the error code has disappeared. If not, proceed to other troubleshooting methods.

It’s important to note that sometimes a simple reset can resolve many electronic errors in appliances like dishwashers. By following this step, you might save time and effort without needing further intervention.

If you’re still seeing the H01 error after resetting your Bosch dishwasher, consider moving on to part replacement as an alternative solution.

When a simple reset doesn’t work for fixing Error H01 on your Bosch dishwasher, replacing certain parts might be necessary. In particular cases where technical issues persist despite resetting efforts, changing malfunctioning components can effectively resolve persistent errors like H01.

One common part that may need replacement is the control board or module of your Bosch dishwasher. The control board is essentially like a brain for your appliance; if it malfunctions or fails due to electrical issues or wear and tear over time, various errors such as H01 can occur.

Another component worth checking is the heating element of your Bosch dishwasher. A faulty heating element could lead to temperature-related errors like H01 when trying to operate specific cycles or programs.

Preventing Future Issues

Regular Maintenance

Regular maintenance is essential to prevent future issues with your Bosch appliance. This includes cleaning, inspecting, and servicing the appliance at regular intervals. For example, if you own a Bosch dishwasher, regularly check and clean the filter to ensure it doesn’t get clogged with food particles or debris. Inspect the door gasket for any signs of wear and tear and replace it if necessary. By performing these simple maintenance tasks, you can avoid potential issues such as water leakage or poor cleaning performance.

It’s also crucial to keep the exterior of your Bosch appliance clean. Wipe down the surfaces regularly using a mild detergent and soft cloth to prevent dirt buildup that could potentially affect its performance. Furthermore, pay attention to any unusual noises or odors coming from the appliance during operation as these could indicate underlying issues that need prompt attention.

Usage Best Practices

Adhering to usage best practices can significantly contribute to preventing future problems with your Bosch appliance. Always follow the manufacturer’s instructions regarding load capacity when using appliances like washing machines or dryers. Overloading these appliances can lead to excessive wear and tear on components such as bearings and belts.

Moreover, be mindful of what items you place in your Bosch oven or microwave. Using inappropriate cookware in an oven can lead to uneven cooking or damage to the interior surfaces. Similarly, placing metal objects inside a microwave oven can cause sparks and damage its cavity.

Avoid pre-rinsing dishes excessively before loading them into the machine as this may interfere with its sensor technology designed for optimal cleaning efficiency.

Understanding Common Dishwasher Issues

Typical Malfunctions

Dishwashers, like any other appliance, can experience various malfunctions over time. One common issue is a clogged drain. When the dishwasher doesn’t drain properly, it could be due to food particles or debris blocking the drain hose or filter. Another typical problem is a malfunctioning door latch. If the door doesn’t close properly, it can lead to water leakage during the wash cycle.

Moreover, another frequent malfunction is related to the spray arm. The spray arm distributes water throughout the dishwasher during operation. If it becomes clogged or damaged, your dishes may not receive an adequate amount of water and detergent for proper cleaning.

A faulty heating element can also cause issues with dishwashing performance. The heating element is responsible for maintaining optimal water temperature during cycles. If it malfunctions, your dishes might not dry completely at the end of a cycle.

In some cases, a malfunctioning motor could be to blame for your dishwasher problems as well. The motor powers critical functions such as spraying water and draining after each cycle.

Signs of Trouble

Recognizing signs of trouble early on can help prevent further damage and costly repairs down the line. One noticeable sign is standing water at the bottom of your dishwasher after running a cycle – this indicates that there’s an issue with drainage.

Another red flag to watch out for is if you notice that your dishes are still dirty after completing a full washing cycle; this could indicate problems with either insufficient water distribution or ineffective spraying due to issues with components like spray arms or filters.

Furthermore, unusual noises during operation such as grinding or rattling sounds may signify underlying issues within your dishwasher’s mechanisms – these should not be ignored and warrant investigation promptly.

An additional warning sign includes visible leaks around the base of your dishwasher which could indicate problems with seals or gaskets causing unwanted seepage during operation.

Model-Specific Guidance

SMS63M08AU Troubleshooting

There are a few common issues you might encounter. One of the most frequent problems is the dishwasher not draining properly. If you notice standing water at the bottom of your dishwasher after a cycle, this could be an indication of a drainage issue.

To troubleshoot this problem, start by checking for any debris or food particles that may be clogging the drain. Remove and clean the filter and check the drain hose for any obstructions. Sometimes, simply clearing out these blockages can resolve the drainage issue and get your dishwasher back to working order.

Another common problem with the SMS63M08AU model is dishes not coming out clean after a wash cycle. This can be frustrating, but it’s often due to simple causes such as using too much or too little detergent, overloading the dishwasher, or placing dishes in a way that blocks proper water circulation.

To address this issue, ensure that you’re using the correct amount of detergent according to Bosch’s guidelines. Avoid overcrowding your dishwasher so that water and detergent can reach all surfaces effectively. Properly arranging dishes in a way that allows water to flow freely around them is crucial for achieving spotless results.

In some cases, you might find that your Bosch SMS63M08AU dishwasher isn’t filling with enough water during a wash cycle. If you notice this issue occurring consistently, it could be related to a faulty inlet valve or an obstructed water supply line.

Firstly check if there are any kinks or blockages in the inlet hose leading into your dishwasher. Ensure that both ends are securely connected without any damage or wear on the hose itself. If everything appears intact but you’re still experiencing low water levels during cycles, it may be necessary to have a professional inspect and potentially replace the inlet valve.

Remembering these troubleshooting steps when encountering issues with your Bosch SMS63M08AU will help keep its performance optimal while ensuring efficient dishwashing every time.


You’ve now mastered the art of troubleshooting and fixing the dreaded Error H01 in your dishwasher. By following the maintenance routines and understanding common dishwasher issues, you’re well-equipped to tackle any future challenges. Remember, regular maintenance is key to preventing such errors from recurring. Just like giving your car regular tune-ups to prevent breakdowns, taking care of your dishwasher ensures smooth and efficient operation.

So, roll up your sleeves and give your dishwasher some TLC. Stay proactive with the maintenance routines and keep an eye out for any signs of trouble. Your diligence will not only save you from the hassle of dealing with errors but also prolong the lifespan of your trusty appliance. Happy dishwashing!

Frequently Asked Questions

What does the error code H01 mean on a Bosch dishwasher beeping?

The error code H01 on a Bosch dishwasher indicates an issue with the heating element. It could be caused by a faulty temperature sensor or a problem with the heating circuit.

How can I troubleshoot and fix the H01 error on my Bosch dishwasher when washing dishes?

You can troubleshoot the H01 error by checking for any blockages in the heating element, testing the temperature sensor, and ensuring proper electrical connections. If these steps don’t resolve the issue, it’s advisable to seek professional assistance.

Is there a way to prevent future occurrences of the H01 error on my Bosch dishwasher when washing dishes?

Regular maintenance such as cleaning filters, inspecting for debris, and running cleaning cycles can help prevent issues like the H01 error. Using recommended detergents and following loading instructions can contribute to preventing this error from occurring again.

Adjusting timer settings may not directly resolve an H01 error. However, ensuring that programmed cycles align with manufacturer recommendations for water temperature and duration could indirectly impact heating-related errors like H01.

Where can I find model-specific guidance for fixing an H01 error on my particular Bosch dishwasher model?

For model-specific guidance regarding troubleshooting and fixing an H01 error on your specific Bosch dishwasher model, refer to your appliance’s user manual or visit the official website of Bosch appliances for detailed information tailored to your machine.