Bosch dishwashers are known for their reliability, efficiency, and advanced technology. However, like all modern appliances, they rely on internal sensors and electronic systems to monitor performance. When something goes wrong, the machine displays an error code instead of simply stopping without explanation.
For many users, these codes can be confusing. Understanding what each code means can help you identify the issue quickly, determine whether it is something you can check yourself, and decide when professional repair is necessary.
This guide explains the most common Bosch dishwasher error codes, what causes them, and what actions you should take.
If your dishwasher is not working properly, booking dishwasher repair services near you ensures accurate diagnosis and long-term reliability.
How Bosch Dishwasher Error Codes Work
Bosch dishwashers use a diagnostic system that detects faults in:
• Water intake
• Drainage
• Heating
• Sensors
• Electrical components
When a problem occurs, the machine displays an error code on the control panel. These codes help identify the specific system that is affected.
Most Common Bosch Dishwasher Error Codes
E15 – Water Leak Detected
What it means:
The dishwasher has detected water in the base tray.
Common causes:
• Internal leak
• Faulty door seal
• Overflow
What you can check:
• Turn off the machine
• Inspect for visible leaks
• Check door seals
When to call a technician:
If the error persists, internal components may be damaged.
E24 – Drainage Problem
What it means:
The dishwasher cannot drain water properly.
Common causes:
• Blocked drain hose
• Clogged filter
• Faulty pump
This leads to dishwasher not draining, where water flow is restricted.
What you can check:
• Clean the filter
• Inspect the drain hose
E25 – Drain Pump Blocked
What it means:
The drain pump is obstructed or not working.
Common causes:
• Debris inside pump
• Broken pump component
What you can check:
• Remove and clean filter
• Check for obstructions
E09 – Heating Element Fault
What it means:
The dishwasher is not heating water properly.
Common causes:
• Faulty heating element
• Electrical issue
Symptoms:
• Dishes not drying
• Cold wash cycles
E19 – Internal Valve Issue
What it means:
A problem with the internal water valve.
Common causes:
• Valve malfunction
• Electrical fault
E01 / E02 – Control Board Fault
What it means:
The main control board has an issue.
Common causes:
• Power surge
• Internal electrical failure
Important:
These faults often require professional repair.
E22 – Filter Blockage
What it means:
The filter is clogged and restricting water flow.
What you can do:
• Clean the filter thoroughly
E18 – Water Supply Issue
What it means:
The dishwasher is not receiving enough water.
Common causes:
• Closed water tap
• Low water pressure
• Blocked inlet hose
E27 – Power Supply Problem
What it means:
Voltage supply is unstable.
Common causes:
• Load shedding
• Electrical fluctuations
This is particularly relevant in South African households.
How to Reset a Bosch Dishwasher
In some cases, resetting the dishwasher may clear temporary errors.
Basic reset steps:
• Turn off the machine
• Wait 5 minutes
• Restart the cycle
If the error returns, it indicates a persistent fault.
When You Can Fix It Yourself
Some error codes are linked to simple issues.
You can safely check:
• Filters
• Hoses
• Water supply
• Minor blockages
When to Call a Professional Technician
Call a technician if:
• The error code persists
• There is electrical damage
• Water leaks are present
• The machine stops repeatedly
Booking dishwasher repair services near you ensures the problem is fixed correctly.
Preventing Dishwasher Error Codes
Regular maintenance helps prevent many faults.
Key tips:
• Clean filters regularly
• Avoid overloading
• Use correct detergent
• Check hoses and seals
• Run cleaning cycles
Why Bosch Dishwashers Display Error Codes
Error codes are designed to:
• Protect internal components
• Prevent further damage
• Help diagnose faults quickly
Instead of guessing, these codes provide a clear indication of the issue.
Cost of Bosch Dishwasher Repairs
Typical Cost Range
| Repair Type | Estimated Cost |
|---|---|
| Minor repair | R600 – R900 |
| Pump repair | R800 – R2,600 |
| Heating element | R1,200 – R2,800 |
| Control board | R1,500 – R3,500+ |
Costs vary depending on the fault and parts required.
Frequently Asked Questions
What is the most common Bosch dishwasher error?
E24 and E25 are among the most common, usually related to drainage problems.
Can I fix Bosch error codes myself?
Some minor issues can be resolved by cleaning filters or checking hoses, but complex faults require professional repair.
Why does my Bosch dishwasher keep showing errors?
Recurring errors usually indicate an unresolved underlying problem.
Is it safe to use a dishwasher with an error code?
No, continued use may cause further damage.
How do I clear an error code?
Resetting the machine may clear temporary faults, but persistent errors require repair.
When should I call a technician?
If the error persists or involves electrical or internal components.
Final Thoughts
Bosch dishwasher error codes are designed to help you quickly identify problems and prevent further damage. While some issues are simple and can be resolved with basic checks, others require professional expertise to ensure safe and effective repair.
Understanding what these codes mean allows you to take the right action early, reducing downtime and avoiding unnecessary costs.
If your dishwasher is displaying an error code or not functioning properly, professional repair is the most reliable solution.
