Bosch Dishwasher Error Code E01 — What It Means & How to Fix It

What Does This Error Mean?

The E01 error on your Bosch dishwasher means the heating element took too long to heat the water. The machine expected the water to reach a certain temperature within a set time. It stopped the cycle because the water is not getting hot enough.

Affected Models

Bosch 300 Series
Bosch 500 Series
Bosch 800 Series
Most Bosch built-in dishwashers

Common Causes

The heating element has burned out or is no longer working
The temperature sensor (NTC) is giving incorrect readings
A wiring connection to the heating element has come loose
The control board is not sending power to the heating element
The incoming water temperature is too cold for the heater to compensate

How to Fix It

Run your kitchen hot water tap for two minutes before starting the dishwasher. This ensures hot water reaches the machine right away.

Cold water in the pipes can slow down heating and trigger E01.
Turn off the dishwasher and unplug it for five minutes. Plug it back in and try running a cycle again.

A power reset can clear temporary sensor glitches.
Check your home's water heater. Make sure it is set to at least 120°F (49°C).

If your water heater temperature is too low, the dishwasher heater has to work much harder.
Look under the sink to make sure the hot water supply valve to the dishwasher is fully open.

Some dishwashers are connected to the hot water line only. A closed valve means cold water.
If the error keeps coming back, the heating element or temperature sensor likely needs replacing. Call a technician.

A heating element costs $30–$80. The sensor costs $15–$40.

When to Call a Professional

Heating element issues usually require a technician. They can test the element and sensor with a multimeter. Do not attempt to access electrical components unless you are comfortable with appliance repair. Expect repair costs of $150–$350 including parts and labor.

Frequently Asked Questions

Will my dishes still get clean with the E01 error?

Probably not. Hot water is essential for dissolving grease and killing bacteria. If the heater is not working, dishes may come out greasy or not sanitized. Fix the error before running more loads.

Is E01 the same as E09 on a Bosch dishwasher?

They are related but different. E01 means the water is not reaching the target temperature in time. E09 means the heating circuit itself has a fault. E09 is usually more serious and always needs a technician.

Can running hot water before starting the dishwasher really help?

Yes — this is a simple but effective trick. The pipes between your water heater and dishwasher hold cold water. Running the tap first flushes that cold water out. The dishwasher then gets hot water right from the start.