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BOSCH H01

Bosch Dishwasher Error Code H01: Startup Timer Active (Not an Error Code)

Clear meaning, realistic next steps, and safe guidance without turning the page into a long repair manual.

What it means

This is not an actual error code, but an indication that the start-up timer menu has been accessed to delay the start of the cycle, with H01 for a 1-hour delay and h02 for a 2-hour delay, and so on.

Severity

Medium - some user checks may help, but repeated faults often need service.

Can you fix it yourself?

Partial — start with DIY steps

Most likely cause

Delay-start function is active — dishwasher is waiting to begin the cycle

Estimated time for safe first checks: 1–2 min.

Step-by-Step DIY Fix Guide

  1. SAFETY: No electrical hazard — H01 is a status indicator, not a fault code.
  2. H01 is not a fault code. It means the delay-start timer is running.
  3. To cancel the delay and start immediately: press and hold the Start button for 3 seconds, or press Cancel/Reset.
  4. The dishwasher will begin the selected cycle immediately after canceling the delay.

If the warning comes back after restart

  • If airflow still seems weak after the basic checks, the fan path or a deeper obstruction becomes more likely.
  • If the warning returns immediately after a clean restart, the sensor or wiring path becomes more likely than a one-time glitch.

What This Error Means

Error code H01 on your Bosch dishwasher indicates: This is not an actual error code, but an indication that the start-up timer menu has been accessed to delay the start of the cycle, with H01 for a 1-hour delay and h02 for a 2-hour delay, and so on. The appliance detects this condition through its built-in sensors and halts the current cycle to prevent further damage. Depending on the model, the code may flash on the display panel, appear on a digital readout, or cause the status lights to blink in a specific sequence. The dishwasher will not resume normal operation until the underlying fault is resolved.

The most frequent cause of error H01 is delay-start function is active — dishwasher is waiting to begin the cycle. When this happens, the dishwasher's control board detects the abnormal sensor reading or motor response and triggers the fault code as a protective measure. Other contributing factors are listed in the causes section below — working through them in order is the fastest path to a fix.

Many cases of error H01 can be resolved with DIY troubleshooting — start with the steps below before calling a technician. If the steps do not clear the code, the fault is deeper in the system and professional diagnosis will be needed. The guide specifies clearly at which point to stop DIY work.

Unlike most Bosch error codes, H01 does not indicate a malfunction. The appliance is working exactly as designed — it is simply waiting for the delay timer to count down before beginning the selected wash program.

Most Likely Cause by Symptom

This display item is often a status or indicator message rather than a true fault.

Likely cause: Delay-start function is active — dishwasher is waiting to begin the cycle

Check first: SAFETY: No electrical hazard — H01 is a status indicator, not a fault code.

Common Causes

  • Delay-start function is active — dishwasher is waiting to begin the cycle
  • TimeLight or delay timer was accidentally set

What Not to Do

  • No restrictions — H01 is a timer indicator, not a fault

Model and Display Variation Notes

Model-family notes

  • Bosch dishwasher display wording and code formats can vary by series.
  • If your model behaves differently, check the owner manual before trying any deeper maintenance step.

Display and panel differences

  • Panel wording can vary by series, so confirm the exact code pattern before buying parts.

Parts, Tools and Service Options

Service option

Bosch service visit if the warning returns after the basic checks are complete.

Manual and model check

Check your exact model and manual before ordering any Bosch dishwasher parts.

This section stays service-first because the page points more strongly toward support or professional repair than a routine parts purchase.

How to Prevent It Recurring

  • Familiarise yourself with the delay-start button location on your model to avoid accidental activation

Related Error Codes

Extra notes

  • This page is based on Bosch support material and stays conservative where model-specific guidance may vary.
  • The goal is to help you identify safe first checks before you move into parts, service, or model-specific manual lookup.

Source and model notes

Last reviewed: 2026-04-07

Based on: Based on Bosch support material and edited into consumer-safe guidance for the exact code family on this page.

View Bosch US Official

Model coverage note: Bosch dishwasher code meanings can vary by series, control panel, and model family, so use this page as a safe starting point rather than a replacement for the model-specific manual.

Important: FixThisError is an independent guide, not the manufacturer. Use your model-specific manual when the panel wording or behavior differs.

Always disconnect power before inspecting appliances. If unsure, contact a licensed appliance technician.