If your Bosch dishwasher has stopped mid-cycle and flashed a code you don’t recognize, you’re not alone — it’s one of the most searched dishwasher problems every year. The good news is that most Bosch error codes point to something you can diagnose, and often fix, in under 15 minutes without calling a technician.
This guide covers every current Bosch dishwasher error code, what it actually means, whether it’s a DIY fix or a call-a-pro situation, and the exact steps to resolve the most common ones.
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Table of contents
What Do Bosch Dishwasher Error Codes Mean?
Bosch dishwashers display error codes as either a blinking light pattern (on older models without screens) or a direct code like E15, E24, or E01 (on models with digital displays). Each code corresponds to a specific fault — most commonly related to water inlet, drainage, heating, or sensor issues — and can usually be identified from the chart below.
Full Bosch Dishwasher Error Code Chart
| Code | Meaning | DIY Fix? |
| E01 | Electronic control unit fault | Reset first; call service if it persists |
| E02 | Temperature sensor (NTC) fault | Usually needs a technician |
| E03 | Heating element or thermostat fault | Sometimes DIY (check heater element) |
| E04 | Water heating circuit failure | Call a technician |
| E05 | Overfill/water level sensor issue | DIY — check float switch |
| E09 | Heating circuit interruption | Call a technician |
| E15 | Aquastop / water leak detected in base pan | DIY — inspect for leaks, dry base, reset |
| E17 | Water inlet fault (flow meter) | DIY — clean inlet filter and flow meter |
| E18 | Long fill/water inlet blocked | DIY — check water supply valve and hose |
| E22 | Filter or drain pump blocked | DIY — clean filter and drain pump |
| E23 | Drain pump seal/motor fault | Sometimes DIY (check pump for debris) |
| E24 | Drainage fault — water not pumping out | DIY — clear hose kink, clean filter |
| E25 | Drain hose blockage | DIY — inspect and clear hose |
| E27 | Power supply/voltage fault | Call a technician |
(This chart covers the codes most frequently reported across current Bosch dishwasher lines. Exact code availability can vary slightly by model.)
How to Fix the Most Common Bosch Error Codes (Step-by-Step)
Fixing E15 (Aquastop / Leak Detected)
- Switch off the dishwasher and unplug it.
- Carefully tilt the unit forward to drain water pooled in the base pan.
- Inspect the water inlet hose and drain hose for visible cracks or loose fittings.
- Dry the base pan fully before restarting.
- Run a short cycle to confirm the leak is resolved.
Fixing E24 / E25 (Drainage Issues)
- Remove and clean the filter assembly at the bottom of the dishwasher tub.
- Check the drain hose for kinks or blockages, especially near the sink connection.
- Inspect the drain pump for trapped food debris or glass fragments.
- Run a rinse cycle to test drainage.
Fixing E17 / E18 (Water Inlet Issues)
- Confirm the water supply valve behind the dishwasher is fully open.
- Disconnect the inlet hose and clean the mesh filter screen.
- Check for kinks in the hose that may be reducing water flow.
- Reconnect and run a normal cycle.
When to Call a Bosch Technician
Call a professional if:
- The same error code returns after a reset and basic cleaning
- The code involves the heating element or electronic control unit (E02, E04, E09, E27)
- You notice burning smells, sparking, or exposed wiring
- The dishwasher is still under warranty (DIY repairs can void coverage)
People Also Ask: Common Bosch Error Code Questions
What does E15 mean on a Bosch dishwasher?
E15 means the Aquastop system has detected water in the base pan, usually from a leak. Turn off the machine, tilt it slightly to drain the base pan, dry it out, and check hoses for cracks before restarting.
What does E24 mean on a Bosch dishwasher?
E24 signals a drainage problem — water isn’t being pumped out properly. Check the drain hose for kinks, clean the filter at the bottom of the tub, and make sure the drain pump isn’t blocked by debris.
How do I reset my Bosch dishwasher after an error code?
Turn the dishwasher off at the power switch, wait 1–2 minutes, then turn it back on. On some models, holding down the Start button for 3 seconds also clears a soft-lock error.
Why does my Bosch dishwasher show E17 or E18?
These codes point to a water inlet problem — usually a blocked inlet filter, a partially closed water supply valve, or low water pressure. Cleaning the mesh filter where the hose connects to the machine solves this in most cases.
Can I fix a Bosch dishwasher error code myself?
Yes, in most cases. Water inlet, drainage, and float switch errors (E15, E17, E18, E22, E24, E25) are usually DIY-friendly. Heating and electronic control errors (E02, E04, E09, E27) more often require a technician.
Does a Bosch dishwasher error code mean it’s broken permanently?
No. Most codes are triggered by blockages, low water pressure, or safety sensors doing their job — not permanent damage. A reset after clearing the underlying issue resolves the majority of cases.
Conclusion
Most Bosch dishwasher error codes aren’t a sign of a broken machine — they’re the appliance flagging a specific, fixable issue: a clogged filter, a kinked hose, or a tripped safety sensor. Start with the code chart above to identify the fault, try the matching DIY fix, and reset the unit. If the same error keeps returning after that, especially one involving heating or electronics, it’s time to call a certified technician rather than risk further damage.
