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Thermador Dishwasher won't fill

If your Thermador dishwasher won't fill, start with the water inlet valve, since a clogged or failed valve is the most common reason a dishwasher not filling with water gets no water at all. Next, check the safety float in the front corner of the tub. If something is stuck underneath it, the dishwasher can think it is already full and shut off incoming water. From there, confirm the main control board is sending power to the inlet valve, make sure the water supply shut-off valve under the sink is fully open, and test the float switch for continuity. A bad control board can also cause a dishwasher no water problem by keeping the valve from opening. On a Thermador dishwasher, these are the parts most often tied to a dishwasher won't fill complaint: water inlet valve, safety float, float switch, main control board, and control board. Enter your model number on RepairClinic.com to find the exact Thermador replacement part that fits your specific dishwasher.

01 - Thermador Dishwasher Water Inlet Valve

The water inlet valve opens to allow water to enter the dishwasher. If the water valve is clogged or defective, water will not flow into the dishwasher. Water inlet valves are not repairable—if the valve is defective, you must replace it.
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Top Solution

02 - Object stuck under the safety float

Some dishwashers have a safety float in the front corner of the tub to prevent the dishwasher from overfilling with water. If an object is stuck under the float, the dishwasher may not fill with water. If you find anything stuck under the float, remove it and the dishwasher should start filling properly.
Top Solution

03 - Thermador Dishwasher Main Control Board

A dishwasher's main control board provides power to nearly every electrical component in the dishwasher. A faulty board may be unable to supply power to the water inlet valve, preventing it from opening and allowing the necessary water to fill the tank.
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Highly Likely

04 - Water supply valve turned off

You should confirm that the dishwasher's water supply shut-off valve is in the "On" or open position. The water supply shut-off valve is usually located under the sink and is connected to the hot water line.
Highly Likely

05 - Thermador Dishwasher Float Switch

The float switch is a safety designed to shut off the water inlet valve if the dishwasher is overfilling. If the float switch is defective or stuck, it might stop the dishwasher from filling correctly. You can use a multi meter to test the float switch for continuity. If the float switch is defective, replace it.
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Highly Likely

06 - Thermador Dishwasher Control Board

A dishwasher's control board provides power to nearly every electrical component in the dishwasher. A faulty board may be unable to supply power to the water inlet valve, preventing it from opening and allowing the necessary water to fill the tank.
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Common

Frequently Asked Questions

Why is my Thermador dishwasher not filling with water?
How do I test a Thermador dishwasher water inlet valve or float switch?
Can something under the float keep my Thermador dishwasher from filling?
My Thermador dishwasher has power but no water enters. Is it the control board?
How do I find the right Thermador dishwasher part for a no-fill problem?

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