The Bosch dishwasher is famous for its quiet operation, energy efficiency, and durable performance. But like any advanced appliance, it may occasionally run into issues. When something goes wrong, your dishwasher communicates through a set of Bosch dishwasher error codes (E:##) displayed on the control panel.
Don’t worry—most of these errors point to simple problems that you can fix yourself. Understanding these codes is the first step to becoming your own Bosch dishwasher repair expert and saving on service calls.
Based on official Bosch service manuals and common troubleshooting experience, here’s a complete guide to the most frequent Bosch dishwasher error codes, what they mean, and how to fix them.
🔧 The First Step: Try a Bosch Dishwasher Reset
Before diving into specific error codes, start with the simplest fix—a hard reset.
- Turn OFF the dishwasher using the power button.
- Unplug the unit from the wall or turn off the circuit breaker for about 30–60 seconds.
- Plug it back in and power it on.
If the same Bosch error code appears again, continue to the specific section below for detailed troubleshooting.
💦 Phase 1: Drainage and Filtering Errors (E:22 to E:25)
These are the most common Bosch dishwasher issues, and thankfully, they’re usually easy to fix. They indicate that your dishwasher is having trouble draining water properly.
| Error Code | Meaning | DIY Fix & Checks |
|---|---|---|
| E:22 | Filter Blocked | Clean the filters at the bottom of the tub. Remove the assembly and rinse under warm water using a soft brush. |
| E:24 | Drainage Issue | Check the drain hose for kinks, bends, or blockages. Make sure the filters are clear. |
| E:25 | Drain Pump Blocked or Faulty | After unplugging, access the drain pump impeller beneath the filter. Remove any debris, glass, or food particles. |
| E:23 | Drain Pump Circuit Fault | If the pump is clear, this may indicate an electrical fault in the drain pump or control board. Contact a technician. |
🚰 Phase 2: Water Supply and Leak Detection Errors (E:14 to E:18)
These Bosch dishwasher codes relate to water inlet problems or leak detection.
| Error Code | Meaning | DIY Fix & Checks |
|---|---|---|
| E:14 | Flow Sensor Failure | Check that the water supply valve is fully open and the inlet hose is not kinked. Ideal flow rate: about 10 L/min. |
| E:15 | Water in Base (Leak Detected) | The AquaStop system has detected a leak. Turn off the water supply. You can gently tilt the dishwasher to drain trapped water, but usually a technician is needed to find and repair the leak. |
| E:16 / E:17 / E:18 | Water Inlet or Flow Problem | Inspect the water path from valve to inlet hose. Clean the filter screen where the hose connects to the valve. |
| Faucet Symbol | Water Inlet Fault | Same as E:16/E:17—check the water tap and inlet hose for restrictions. |
🔥 Phase 3: Heating and Temperature Errors (E:09, E:12, E:13)
If your dishes aren’t drying properly or the wash cycle seems cold, these Bosch dishwasher codes point to heating system problems.
| Error Code | Meaning | DIY Fix & Checks |
|---|---|---|
| E:09 | Heating Element Fault | This indicates a heat pump or heater failure. The component must be replaced by a qualified Bosch technician. |
| E:12 | Limescale Build-Up | Run an empty hot cycle with Bosch dishwasher descaler or white vinegar to remove mineral deposits. |
| E:13 | Water Temperature Too High | Ensure your home’s water supply isn’t too hot (over 75°C / 167°F). Bosch dishwashers are designed for cold or lukewarm water intake. |
⚙️ Phase 4: Component & Power Errors (E:01 to E:06, E:27–E:29)
These error codes are related to the electronics or sensor systems inside your dishwasher.
| Error Code | Meaning | DIY Fix & Checks |
|---|---|---|
| E:01 / E:02 / E:03 / E:04 / E:05 | Internal Power or Module Fault | Try a hard reset first. If the error persists, it often points to a main control board failure. |
| E:06 | Door Sensor Malfunction | Make sure the door closes securely. If the error continues, the door latch sensor may need replacement. |
| E:27 / E:29 / E:30 | Low Mains Voltage | The dishwasher isn’t receiving sufficient power. Test the outlet with another device or have an electrician check your voltage. |
| E:28 (AquaSensor Fault) | Turbidity Sensor Dirty or Faulty | The AquaSensor measures water clarity. Try cleaning it; if the error remains, replacement may be required. |
🧰 When to Call a Bosch Technician
While DIY fixes handle most Bosch dishwasher error codes, some problems require professional service.
Call an authorized Bosch technician if you encounter:
- E:01 – E:05 – Control board or power module failure
- E:09 – Heating element or heat pump malfunction
- E:15 – Active water leak (AquaStop triggered)
- Any error that needs electrical testing or sealed-unit replacement
✅ Final Tip
Understanding Bosch dishwasher error codes can turn an annoying breakdown into a quick, confident repair.
With a bit of troubleshooting knowledge, you’ll have your Bosch dishwasher running smoothly again—and your dishes sparkling clean.
Frequently Asked Questions about Bosch Dishwasher Error Codes
How do I reset my Bosch dishwasher to clear an error code?
To reset your Bosch dishwasher, turn it off using the power button, then unplug it or switch off the circuit breaker for 30–60 seconds. Plug it back in and restart the machine. If the same error code reappears, refer to the specific code section above for further troubleshooting.
What does Bosch dishwasher error code E:15 mean?
Error code E:15 means the AquaStop safety system has detected a water leak in the base tray. Turn off the water supply and unplug the dishwasher. You may tilt it slightly to drain trapped water, but if the issue persists, call a Bosch service technician to locate and fix the leak.
How do I fix Bosch dishwasher error code E:24?
The E:24 error indicates a drainage problem. Check that the drain hose is not bent or clogged, and make sure the filter assembly at the bottom of the tub is clean and properly seated.
What causes Bosch dishwasher error code E:09?
Error E:09 points to a heating element or heat pump fault. This usually requires replacement by a Bosch-authorized technician, as it involves internal electrical components.
When should I call a Bosch service technician?
You should contact a Bosch technician for serious issues such as error codes E:01–E:05 (control module faults), E:09 (heater failure), or E:15 (active water leak). If the repair involves electrical testing or sealed components, always seek professional help.
I am a master Appliance Repair technician with over 35 years of experience in the field. I am passionate about helping people troubleshoot their appliances and fix common problems. My website, appliancemode.com, provides a wealth of information on troubleshooting common appliance issues and deciphering error codes. This website aims to empower people to tackle appliance repairs themselves and save money on service calls.
