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.

Next step

Choose the next step for not starting after delay

Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.

Check during diagnosis

Most relevant component to inspect

Main Control Board

The central brain of the appliance that controls all components, cycles, and timings.

Typical part-only price
$120 - $280
DIY difficulty
Medium
Estimated time
20-40 mins
Where can I find the model number?

Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.

Find a part that fits my model

Verify the complete model and part number on the retailer's compatibility page before ordering.

Other parts options

Check related components first; use model search as a fallback.

Possible related component

Pressure Switch

Detects the water level inside the tub and signals when to start or stop filling.

$25 - $65 · Easy · 15-30 mins

Check fit & price
Possible related component

Float Switch

Detects the maximum water level to prevent overflow and potential flooding.

$15 - $40 · Easy · 10-20 mins

Check fit & price
Model number required

Model-compatible Dishwasher parts

Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.

Find a part that fits my model

Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. We may earn a commission from other qualifying purchases or service requests made through links on this page, at no additional cost to you. Recommendations are based on repair relevance, not commission rate.

Optional routine care

Maintenance supplies

These products support cleaning or routine upkeep. They are separate from the possible repair components above and are not claimed to fix this error code or symptom.

Maintenance supply

Dishwasher Cleaner and Descaler

Supports routine removal of mineral scale, grease, and odor. It is maintenance, not a repair for a failed pump, valve, or control.

View maintenance supply
Maintenance supply

Braided Dishwasher Inlet Hose

For replacement of an externally damaged supply hose. Verify connection size, length, and appliance installation requirements before ordering.

View maintenance supply

Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.

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

Guidance from available sources; statistical claims are shown only for samples of at least 10 discussions

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.

Limited-source guidance; percentages and success-rate claims are not shown
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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