A Bosch dishwasher will often communicate using error codes when something is amiss. Thus, it’s essential to know how to decipher the various Bosch dishwasher troubleshooting error codes as soon as they pop up.
Common Bosch dishwasher error codes that you can troubleshoot include E01, E02, E03, E05, E7, E09, E10, E12, E14, E15, E16, E19, E21, E22, E23, E24, E25, E27 and H01.
I’ll discuss all these error codes with you to help you know what they mean and clear them from your dishwasher. Moreover, we’ll look at a few error symbols that may also appear on your Bosch dishwasher.
They all may need your attendance, and you don’t have to call Bosch each time they pop up. So, let’s dive in!
In a hurry? Below is a quick guide on How to clear Bosch dishwasher error codes:
A Quick Guide to Clearing Bosch Dishwasher Troubleshooting Codes
| – | Error Code | Meaning | Likely Cause | Quick Fix |
| 1. | E01 | Heat pump motor fault | Malfunctioning heat pump motor | Reset the dishwasher but call Bosch if the error won’t clear |
| 2. | E02 or E03 | Main control board fault | Malfunctioning control board heater relay | Reset the dishwasher but call Bosch if the error won’t clear |
| 3. | E05 | Wash arm diverter circuit fault | Control board malfunction | Reset the dishwasher but call Bosch if the error won’t clear |
| 4. | E06 | Door sensor fault | Faulty/malfunctioning door sensor | Reset the dishwasher but call Bosch if the error won’t clear |
| 5. | E07 | Zeolite fan motor fault | Defective zeolite or crystal dry fan motor | Reset the dishwasher, but replace the Zeolite fan motor if the error won’t clear. |
| 6. | E09 or E20 | Heat pump internal heater error | A problem with the heat pump internal heater | Reset the dishwasher but call Bosch if the error won’t clear |
| 7. | E10 | Zeolite chamber heater error | A problem with the zeolite chamber heater | Reset the dishwasher but call Bosch if the error won’t clear |
| 8. | E12 | Limescale build-up | Limescale accumulation around the heat pump | Descale the dishwasher and soften hard water |
| 9. | E14 | Flow meter fault | An issue with the water filling | Check the dishwasher water supply |
| 10. | E15 | Leak detected | Water leakage in the dishwasher base | Turn off the dishwashers water supply and call Bosch |
| More Error Codes | ||||
| 11. | E16, E17 or E18 | Water flow/supply issue | Kinked or leaky inlet hose adequate water level or low pressure | Unkink the inlet hose or replace it if broken, check the water level, and adjust the water pressure |
| 12. | E19 | Detergent-dispenser solenoid circuit error | – | Reset the dishwasher but call Bosch if the error won’t clear. |
| 13. | E21 | Blocked heat pump | – | Reset the dishwasher but call Bosch if the error won’t clear. |
| 14. | E22 | Blocked filter | Food or debris clog | Clean the dishwasher filter with mild soap, water, and a soft brush |
| 15. | E23 | Drain pump fault | Clogged or defective drain pump | Clean the drain pump if it is blocked and replace it if it is faulty |
| 16. | E24 | Drainage problem | Inlet hose, filter, or garbage disposal blockage | Clear the inlet hose, filter, and garbage disposal of any blockage |
| 17. | E25 | Blocked drain pump or drain pump cover fault | Drain pump clogging or a loose/missing drain pump cover | Clean the drain pump if clogged and tightly fit the drain pump cover |
| 18. | E27 | Power supply fault | Low power supply | Reset the dishwasher, but call an electrician if the error reappears |
| 19. | H01 | Delay Start mode | Activated Delay Start | Cancel Delay Start, select another cycle, or wait for the dishwasher to start. |
Quick Troubleshooting
As you can tell from the above Bosch dishwasher troubleshooting manual, I’ve mentioned resetting the dishwasher under the fixes. So, I figured I should share a quick guide to doing it now.
Here’s how to do it:
- Locate the circuit breaker and turn it off
- Wait for at least 30 seconds to flip the circuit breaker on
- Alternatively, unplug the dishwasher for at least 30 seconds and then plug it back in
Common Bosch Dishwasher Troubleshooting Error Codes
Below are 19 common Bosch dishwasher troubleshooting error codes:
1. Bosch Dishwasher Error Codes E01
(Meaning – Heat Pump Motor Fault)
The error code E01 pops up on a Bosch dishwasher when there’s an issue with the heat pump motor circuit, more so at the control board.
Fix
Reset the dishwasher to reset the control board. If the error won’t go, call Bosch.
2. Error Code E02 or E03
(Meaning – Main Control Board Relay Fault)
If there’s a problem with the main control board relay, the error code E02 or E03 may appear on your Bosch dishwasher.
Fix
Reset the dishwasher. However, if the error won’t disappear, call Bosch.
3. Error Code E05
(Meaning – Wash Arm Diverter Circuit fault)
The wash arm diverter circuit will trigger the error code E05 if there’s a malfunction, especially in the main control board.
Fix
Reset the dishwasher. If that doesn’t work, call Bosch support.
4. Error Code E06
(Meaning – Door Sensor Fault)
The door sensor controls the opening and closing of the dishwasher door. Thus, you may have difficulty latching the door if it’s faulty, and sometimes the dishwasher won’t start. You can tell if that’s the case if the E06 error code pops up.
Fix
Reset the dishwasher
5. Bosch Dishwasher E7 Error Code
(Meaning – Zeolite Fan Motor Fault)
A Bosch dishwasher features a crystal dry or Zeolite fan motor that helps dry the dishes. The E07 error code will pop up if this fan motor is faulty.
Fix
Reset the dishwasher and if the error code won’t clear, call Bosch.
6. Bosch Dishwasher Error Codes E09 or E20
(Meaning – Heat Pump Internal Heater Error)
The error code E09 or E20 pops up when there’s an issue with the heat pump’s internal heater, which may mean the dishwasher water is not getting hot.
Fix
Reset the dishwasher. If the error won’t clear, call Bosch.
7. Bosch Dishwasher Troubleshooting Error Codes E10
(Meaning – Limescale Build-up)
Over time, your Bosch dishwasher will display the E10 error code if there’s a problem with a Crystal Dry or Zeolite chamber heater.
Fix
Reset the dishwasher. If the error doesn’t disappear, call Bosch.
8. Error Code E12
(Meaning – Limescale Build-up)
Over time, lime scale builds up in the dishwasher, especially when using hard water. Once that’s the case, the E12 error code may pop up.
Fix
Consider descaling the dishwasher with a recommended descaler (get it from Amazon). To avoid the issue, soften the water if it’s hard.
9. Error Code E14
(Meaning – Flow Meter Fault)
The flow meter will trigger the error code E14 if it’s malfunctioning. And if that’s not the issue, the code may appear if the dishwasher is having problems filling up with water.
Fix
Check the dishwasher’s water supply, and if you can’t find any fault, call Bosch.
10. Bosch Dishwasher Error Codes E15
(Meaning – Leak Detected)
If water is detected in your dishwasher’s base, the safety switch will trigger the error code E15.
Fix
Shut off the dishwasher’s water supply to stop leakage, then call Bosch support.
11. Error Code E16, E17, or E18
(Meaning – Water Flow/Supply Fault)
Your Bosch dishwasher will tell you when it’s having difficulty filling up with water. In such a case, it’ll display the E16, E17, or E18 error codes, and it could be due to a kinked or leaky/damaged hose, the water level being too low, or inadequate water pressure.
Fix
Unkink the inlet hose if it’s kinked, and replace it if it’s damaged. Call a plumber if you can’t fix it.
12. Bosch Dishwasher Error Codes E19
(Meaning – Detergent Dispenser Solenoid Circuit Error)
The Bosch dishwasher dispenser will show the error code E19 if there’s a problem with the detergent dispenser solenoid circuit.
Fix
Reset the dishwasher, but if the error doesn’t disappear, call Bosch.
13. Error Code E21
(Meaning – Blocked Heat Pump)
The heat pump shouldn’t be clogged or obstructed in any way. If it is, then the error code E21 will appear.
Fix
Reset the dishwasher. If the reset doesn’t work, call Bosch.
14. Bosch Dishwasher Error Codes E22
(Meaning – Blocked Filter)
Over time, the dishwasher filter may clog up from the food and debris it traps. Once that happens, the E22 error code may pop up.
Fix
Clean the dishwasher thoroughly with mild soap, water, and a soft brush to remove the clog.
15. Error Code E23
(Meaning – Drain Pump Fault)
The drain pump is critical in pumping out water and enabling the dishwasher to drain seamlessly. If it’s faulty, the dishwasher will fail to drain but will show the E23 error code.
Fix
Perform the drain pump test to determine if the pump is faulty. If it is, replace it. Clean it, however, if it’s only clogged.
16. Bosch Dishwasher Error Codes E24
(Meaning – Drainage Fault)
A faulty or obstructed drain pump isn’t the only thing that could stop a dishwasher from draining. There are others, such as a clogged inlet hose, filter, or garbage disposal, and in such a case, the E24 error code will pop up.
Fix
Determine why your Bosch dishwasher won’t drain. Clean the inlet hose, filter, and garbage disposal if clogged.
17. Bosch Dishwasher Error Codes E25
(Meaning – Blocked Drain Pump or Drain Pump Cover Fault)
If the drain pump is clogged and thus unable to pump out water, the E25 error code will pop up. Similarly, if the drain pump is missing or not tight enough, the E25 error code will pop up.
Fix
Clear any obstruction from the drain pump and ensure the drain pump cover is tightly fixed.
18. Error Code E27
(Meaning – Power Supply Fault)
Sometimes, the incoming power supply is inadequate to run the dishwasher, and if that’s the case, the E27 error code may pop up.
Fix
Try resetting the dishwasher, but if that doesn’t work, call a pro electrician.
19. Bosch Dishwasher Error Code H01
(Meaning – Delay Start Mode)
Lastly, the code H01 may pop up if the Delay Start option is selected. So, this is ideally not an error code but an active setting that you can override.
Fix
Override the Delay Start by canceling it and picking another setting. However, if you’ve patience, wait for the dishwasher to start at a preset time.
Bosch Dishwasher Error Symbols
A Bosch dishwasher may also display some symbols when all is not well or when trying to ask you to perform a quick command. Some of the commonest Bosch dishwasher error symbols you can’t ignore include the following:
· Tap Symbol
The tap symbol shows that your Bosch dishwasher isn’t receiving enough water, possibly due to different issues. They include a loose water connection or hose, a blocked inlet hose, inadequate water pressure, or failure to turn on the water supply.
· Salt Symbol
The Salt S symbol appears to tell you that lime scale or salt is quickly building up in your dishwasher. So, it is advisable to stop using hard water and fill the dishwasher with the right amount.
· Rinse and Refill
The rinse and refill symbol or indicator appears when the rinse and level drops. In such a case, you should refill the rinse aid.
Concluding Thought
Now you know the meaning of the various Bosch dishwasher troubleshooting error codes. You also know what triggers them and how you can clear them. If you can’t, reach out to Bosch, and you can do it through the customer support number 1-800-944-2904. They should be able to help you fix the issue and clear the error code.