Thermador Dishwasher: leaking
What is this symptom?
Is your Thermador dishwasher leaking water during operation? Common signs include water pooling around the base, leaks through the door, or water visible under the appliance. Identifying the cause is essential for effective repairs.
Important Tips for Thermador Models
- Leaks around the door and base often relate to door gasket degradation and internal hose connections specific to Thermador design.
Possible Causes
Worn or damaged door gasket
How to Identify: Water pooling at the front edge or through the door during wash cycles; visual signs of cracks, hardness, or deformation in the rubber seal.
Part: Door gasket / seal
Faulty or stuck water inlet valve
How to Identify: Leak occurring even when the dishwasher is off or a continuous fill condition; water entering and overfilling the tub.
Part: Water inlet valve
Cracked or misaligned spray arm
How to Identify: Leaks appearing mid-cycle with water splashing in abnormal directions; visible cracks in the spray arm upon inspection.
Part: Spray arm / wash arm assembly
Pump seal or motor shaft seal failure
How to Identify: Leak underneath the dishwasher near the motor area during wash or drain; water trails corresponding with pump operation.
Part: Pump seal / motor shaft seal
Leveling or installation issue
How to Identify: Dishwasher visibly tilting forward or not level, water puddles at front corners but seals and hoses appear intact.
Part: Leveling legs / installation alignment
DIY Solutions
Inspect and Replace Door Gasket
- Turn off power and water to dishwasher.
- Open the dishwasher and visually inspect the entire perimeter gasket for cracks or hard spots.
- Remove the old gasket by gently pulling it out of its channel.
- Install a new Thermador-compatible gasket by pressing it into the channel all around.
- Close and run a short cycle to check for leaks.
Clear and Inspect Hoses and Clamp Connections
- Turn off power and water supply.
- Pull out dishwasher slightly to access rear connections.
- Inspect drain and supply hoses for kinks, cracks, or loose clamps.
- Tighten hose clamps and replace damaged hoses if necessary.
- Reconnect and test with a short rinse cycle.
Next step
Choose the next step for leaking
Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.
Most relevant component to inspect
Door Gasket
Creates a watertight seal around the door to prevent leaks during operation.
- Typical part-only price
- $45 - $110
- DIY difficulty
- Medium
- Estimated time
- 30-60 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.
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.
Water Inlet Valve
Controls the flow of hot and cold water into the appliance.
Spray Arm
Rotates and sprays high-pressure water to clean dishes inside the tub.
Appliance Leveling Leg
Supports and levels the appliance to reduce rocking, vibration, and door-alignment problems.
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.
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.
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.
Braided Dishwasher Inlet Hose
For replacement of an externally damaged supply hose. Verify connection size, length, and appliance installation requirements before ordering.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.
Professional Repairs
Replace Water Inlet Valve
Pump Seal / Motor Shaft Seal Replacement
When to Call a Professional
Preventive Maintenance
-
Clean and inspect door gasket: Gasket deterioration and front-leaks
Frequency: monthly -
Check hoses and clamps: Leaks from hose failure or loose connections
Frequency: annually
Frequently Asked Questions
Why is my Thermador Dishwasher leaking?
How do I fix Thermador Dishwasher leaking myself?
How much does it cost to fix leaking?
When should I call a technician for leaking?
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
- Worn or damaged door seals (2 mentions)
User Suggested Solutions
-
Replaced sump gasket with part 12005744
-
Replace lower door seal assembly and gasket
Limited-source guidance; percentages and success-rate claims are not shown
View
Sources
Data compiled from real discussions on r/appliancerepair and r/Appliances:
Community Discussions
slow leak causing E15 error
Replaced sump gasket with part 12005744, which includes gasket and installation instructions.
Source: Reddit r/appliancerepair
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