The E05 error on your Bosch Dishwasher means the machine has detected a fault with the water heating circuit, usually linked to the temperature sensor (NTC) or the flow-through heater. Most cases can be fixed by resetting the dishwasher and checking the sensor connections before calling for a repair.
| Error code | E05 |
|---|---|
| Meaning | Heating circuit or temperature sensor fault |
| Severity | Medium — dishwasher may still run cycles but won't heat water properly |
| Time to fix | 15–40 minutes |
| Tools needed | Multimeter (optional), screwdriver |
What the E05 error means
The E05 code tells you the dishwasher's control board has picked up an irregular signal from the heating system, most often the temperature sensor (NTC thermistor) that monitors water temperature during a wash cycle. This can happen because of a wiring fault, a failing sensor, or a heater element that's no longer working as it should. It's not usually a sign of a dangerous electrical fault, but it does mean your dishes may come out less clean because the water isn't reaching the right temperature.
Common causes
- Faulty or dislodged temperature sensor (NTC)
- Loose or corroded wiring connector at the heater or sensor
- Failed flow-through heater element
- Limescale buildup affecting the heater or sensor readings
- Control board glitch after a power surge
- Blocked or restricted water flow reducing heater efficiency
How to fix the E05 error
- Power cycle the dishwasher. Switch off at the wall for 5 minutes, then turn back on and run a short cycle to see if the code clears.
- Check for limescale buildup. Run a descaling rinse or dishwasher cleaner cycle, especially if you're in a hard water area, since scale can interfere with the heater and sensor.
- Inspect the sensor wiring. Turn off power, pull out the lower rack, and check that the NTC sensor connector at the base of the tub is firmly seated and free of corrosion.
- Test the heater element. If you're comfortable using a multimeter, check the flow-through heater for continuity; a reading of zero or infinite resistance usually means it needs replacing.
- Reset the control board. Some models clear the fault after holding the Start/Reset button for 3 seconds — check your manual for the exact reset sequence.
- Call a qualified technician if the error keeps returning after these steps, as the heater or sensor may need professional replacement.
FAQ
Can I still use my dishwasher with an E05 error?
You can run cycles, but dishes may not be properly sanitised or dried since the water isn't heating correctly. It's best to fix the fault before regular use.
Will a power reset fix E05 permanently?
Sometimes, if the code was triggered by a temporary glitch. If it returns after a few cycles, the sensor or heater likely needs attention.
Is E05 covered under warranty?
Most Bosch dishwashers carry a 1–2 year warranty on parts and labour, so check your paperwork before paying for a repair — heating faults are commonly covered.
