Question about Thermador DWU244 Dishwasher

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My thermador dw44zs dishwasher: drain pump runs continuously when turned on even when the door is open. I can't seem to reset the cycle to allow for water to come into the dishwash

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There are a few possibities...
if you remove the lid and take the two t20 screw off the left side panel at the front you could check the pressure chamber and its hose are not blocked. Use the link and go to page 4, part 0426 and 0424. You can also remove 0418 (remove t20 screw via the sump after all filters are removeds) this will expose the pump impellor and you can check for any obstruction. If the d/w is connected via a sealed spigot to the sink, remove the grey hose and unscrew the spigot adaptor from the sink and ensure there are no blockages. There may be water in the base of the d/w (base as below the tank, not under the filter) this will activate the flood safety, so check valve, hoses etc for leaks. You will have to manually clear the water from the base pan to deactivate the safety device. Sit the front of the d/w on a large towel and tip the whole unit forward, the base water will then come out. Whilst you have the side panel off, check that the red rod connected to the pressure chamber is not activating the microswitch.
https://www.bosch-eshop.com/eshop(bD1lbiZjPTAwOQ==)/bosch/gb/prodp.htm?prod=DW44ZS%2f21&ESHOPTYPE=S

I hope this helps, Good Luck.

Posted on Jul 13, 2010

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This depends what you mean by "runs". If the dishwasher continues with a wash cycle - i.e. circulating water - with the door open, the simple answer is that you have a defective door microswitch.

However, I suspect what you perceive to be the dishwasher running, is actually the drain pump running continuously. This happens when the anti-flood protection system has been activated and continues even when the door is opened. The simplest way to check is to open the door (while it's "running") and pour some water into the tub. If the water drains away immediately, this shows the drain pump is running and the anti-flood protection has been activated.

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Hi Jonathan,

Welcome to FixYa.

Your float may have got stuck or it's possible that you have water leaking into the bottom of the washer. In the bottom of the wash compartment, next to the drain you will find a plastic dome/mushroom (the float). You might need to rotate the bottom spray arm to see it.

Turn the washer on so that the pump starts to run, open the door and push down on the float. This should stop the pump running. When you let go of the float, if it rises back up on its own, then it's almost certain that you have water in the bottom of the washer. If this is the case please post back for further assistance. If the float stays down, then it may have simply got stuck.

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