Fault Code Reference

Bosch dishwasher H01 error

Information only

This is not a fault. The delay start timer is set, and the number shown is how many hours the machine will wait before it begins washing. The delay start button was pressed deliberately to move the cycle to a cheaper overnight electricity rate is the most common cause.

Difficulty
DIY
Time needed
About 5 min
Checks
5 steps

The same fault is shown as h:01, h02, h03 on some Bosch series, depending on the display and the model year.

What it means

This is not a fault. The delay start timer is set, and the number shown is how many hours the machine will wait before it begins washing.

Most likely causes

Ordered from most to least common, with what each one looks like:

Cause How likely What you would see
The delay start button was pressed deliberately to move the cycle to a cheaper overnight electricity rate high The number counts down by one every hour and the machine eventually starts on its own
The delay button was pressed by accident while selecting a programme, since it often sits next to the start control high Nobody intended to delay anything and the machine simply sat quiet after the door was closed
A child pressed the button while the door was open medium The delay figure is a long one such as nine or twelve hours that nobody would normally choose
The setting was left over from a previous cycle and was never cleared low The same delay reappears every time a programme is chosen

Fix steps

  1. Look at the display and note whether the figure is counting down on its own over the course of an hour.

    Expected result A counting figure confirms this is the delay timer rather than an error report.

  2. Press the delay start button repeatedly and watch the number step round through the available hours.

    Expected result The figure cycles through the hour options and eventually reaches zero hours. If it does not, go to step 3.

  3. Keep stepping until the display shows zero hours, which is the setting that means start immediately.

    Expected result The display reads zero and no delay remains stored. If it does not, go to step 4.

  4. If the figure will not clear, cancel the programme by holding the reset or start control down for a few seconds, then choose the programme again without touching the delay button.

    Expected result The machine returns to a normal programme selection with no hour figure displayed.

  5. Close the door firmly and press start, then listen for the fill valve opening within the first minute.

    Expected result Water enters and the cycle begins straight away rather than waiting.

Parts needed

No replacement parts are needed for the checks above. This fault is usually cleared without fitting anything new.

When to call a technician

Call a qualified technician if you work through every step above and the code comes back, if you find water where it should not be, or if any part of the job needs the machine powered up with panels removed. A repeat fault after a correct repair usually points at the control board rather than the part you replaced.

Common questions

What does H01 mean on a Bosch dishwasher?

This is not a fault. The delay start timer is set, and the number shown is how many hours the machine will wait before it begins washing. The delay start button was pressed deliberately to move the cycle to a cheaper overnight electricity rate is the most common reason for it.

Can I keep using the dishwasher?

Yes. This code is informational and does not by itself stop the machine from being used.

Is this something I can fix myself?

Yes, for most people. The checks below need no special tools and take about 5 minutes.

Models this applies to

Related codes on the same machines

Sources