The E01 error on your Bosch Dishwasher means the control board has detected a problem with the water heating circuit or its temperature sensor. This usually stops the wash cycle partway through so the machine doesn't run with unsafe or incorrect water temperatures. In most cases it's fixable at home without calling an engineer.
| Error code | E01 |
|---|---|
| Meaning | Fault detected in the heating element circuit or its temperature (NTC) sensor |
| Severity | Medium — the dishwasher won't heat water properly until resolved |
| Time to fix | 15–45 minutes |
| Tools needed | Multimeter (optional), screwdriver |
What the E01 error means
Bosch dishwashers use a heating element and a temperature sensor to make sure water reaches the right temperature for each cycle. When the control board can't get a valid reading from this sensor, or detects the heater isn't working as expected, it throws the E01 code and pauses or ends the cycle. This is a safety feature to stop the machine running a cycle with cold or overheated water.
The fault can be caused by a genuinely broken component, but it's often a loose wire, a build-up of limescale, or a temporary glitch in the electronics rather than a full part failure.
Common causes
- Faulty or dirty temperature sensor (NTC thermistor) giving inaccurate readings
- Heating element has failed or has a broken connection
- Loose or corroded wiring between the sensor/heater and the control board
- Limescale build-up affecting the heating element's performance
- Control board fault or a temporary software glitch
- Power supply interruption during a previous cycle
How to fix the E01 error
- Power cycle the dishwasher. Turn it off at the wall, wait 2–3 minutes, then switch back on. This clears temporary glitches and is worth trying first.
- Check for standing water and drainage issues. Make sure the dishwasher isn't holding old water, as this can confuse temperature readings and trigger the error.
- Inspect visible wiring. If you're comfortable doing so, remove the lower kick panel and check that connectors to the heating element and sensor are firmly seated and not corroded.
- Descale the machine. Run a dishwasher descaler or cleaner cycle, especially if you're in a hard water area, since limescale on the heating element is a common trigger.
- Test the heating element with a multimeter. A reading of infinite resistance (open circuit) means the element has failed and needs replacing.
- Call a qualified engineer if the error persists after these steps, as it may point to a control board fault that needs professional diagnosis and parts replacement.
FAQ
Can I still use my dishwasher with an E01 error showing?
It's best not to. The machine may run cycles without properly heating the water, leaving dishes poorly cleaned or cycles ending early.
Will resetting the dishwasher clear the E01 code permanently?
Sometimes, if the cause was a temporary glitch. If the error returns after a reset, there's likely a hardware fault such as a failed sensor or heating element.
Is E01 expensive to fix?
If it's a loose wire or limescale issue, it costs nothing beyond your time. A replacement heating element or sensor is a moderate repair cost; a control board replacement is more expensive and best handled by a professional.
