Thermador Dishwasher: not starting after delay

Professional Repair Guide

What is this symptom?

If your Thermador dishwasher isn't starting after the delay, you may notice the control panel lights up, but no cycle begins. This issue could stem from the delay start feature still being active or potentially a fault in the control panel or main control board. Understanding these causes can help you troubleshoot effectively.

Urgency: Medium

Important Tips for Thermador Models

  • Thermador’s official troubleshooting notes explicitly mention needing to cancel active delay start settings for immediate operation.
  • Control panel may only illuminate when door open or closed depending on model; be aware of model-specific display behavior.

Possible Causes

Delay start feature is active or not cancelled

How to Identify: Display shows delay time remaining or cycle does not start until programmed delay completes; pressing START with delay active doesn’t initiate cycle.

Part: Control panel / timer settings

Faulty control panel / main control board

How to Identify: Buttons unresponsive, display errors, or dishwasher fails to start despite correct settings and power; may require diagnostic test.

Part: Control panel or control board

Stuck float or water supply sensor misreads tub as full

How to Identify: Float stuck in raised position due to debris, preventing fill and thus start; cleaning float restores normal operation.

Part: Float assembly / water level sensor

DIY Solutions

Cancel delay start and start normal cycle

Easy 1–2 minutes
  1. Check display for delay timer.
  2. Press the Delay Start button repeatedly until display shows 0:00 or no delay.
  3. Press START to begin immediate cycle.

Ensure door latches properly

Easy 2–5 minutes
  1. Open and close dishwasher door firmly until you hear latch click.
  2. Inspect door edges for obstructions like dishware blocking closure.
  3. If latch seems sticky, clean around latch and try again.
⚠️ Safety First: Do not force door if misaligned; risking damage.

Deactivate control lock

Easy 1–3 minutes
  1. Observe control panel for lock icon.
  2. Press and hold the specified lock/unlock button combo per your model until lock icon disappears.
  3. Attempt to start cycle normally.

Reset power at breaker to reboot control panel

Easy 5 minutes
  1. Locate household circuit breaker for dishwasher.
  2. Turn breaker fully OFF and wait ~30 seconds.
  3. Turn breaker back ON and test starting dishwasher.
⚠️ Safety First: Ensure breaker handles are returned securely.

Professional Repairs

Replace door switch or latch assembly

Estimated Cost: $60 - $200

Diagnose and replace control board or control panel

Estimated Cost: $200 - $400

Service water level float or sensor

Estimated Cost: $50 - $150

When to Call a Professional

Dishwasher still won’t start after canceling delay, ensuring door latch/switch and control lock are addressed
Persistent error codes on display after reset
Unresponsive control panel or intermittent power behavior
Visible damage to wiring or electronic components

Preventive Maintenance

  • Clean door latch area: Door latch sticking preventing proper closure
    Frequency: monthly
  • Check and clean float assembly: Float sticking causing false water-full reading and start inhibition
    Frequency: quarterly

Frequently Asked Questions

Why is my Thermador Dishwasher not starting after delay?
Common causes include an active delay start feature or a faulty control panel.
How do I fix Thermador Dishwasher not starting after delay myself?
Cancel the delay start, ensure the door latches properly, deactivate the control lock, or reset the power at the breaker.
How much does it cost to fix not starting after delay?
Professional repair costs range from $60 to $400 depending on the issue.
When should I call a technician for not starting after delay?
If DIY solutions fail or if you suspect a control board issue, it's best to call a technician.

References & Sources

Community Analytical Insights

Analysis based on real user discussions from appliance repair communities

Can I Fix This Myself?

75%
DIY Success Rate Difficulty: DIY

Common Issues Reported by Users

  • Door not fully closed or latched, preventing the start of the cycle.
  • Delay start feature malfunction due to a faulty control board.
  • Power supply issues, such as tripped circuit breakers or loose connections.

User Suggested Solutions

  1. Check if the dishwasher door is fully closed and latched. Open and close the door firmly to ensure it is properly secured.

  2. Inspect the control board for any visible signs of damage or malfunction. If necessary, reset the dishwasher by turning off the power for a few minutes before restoring it.

  3. Check the circuit breaker for the dishwasher and ensure it has not tripped. Also, inspect the power cord and connections for any loose or damaged wiring.

Analysis based on 1 community discussions
View Sources

Data compiled from real discussions on r/appliancerepair and r/Appliances:

  1. Delay Start on Thermador dishwasher

Community Discussions

Delay start not functioning properly

If the door is opened during the delay countdown, the dishwasher does not start and requires the start button to be pressed again.

Pro needed View on Reddit →

Source: Reddit r/appliancerepair

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