Question about Bosch 24 in. SHU43 Built-in Dishwasher

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Shu3302uc/u12 will not pump out - Bosch 24 in. SHU43 Built-in Dishwasher

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It's most likely a seized pump impeller/motor bearings or a burnt-out pump motor. There are some simple tests for the pump that anyone can do:

A. If your washer is full of water:

1. Select a wash program and press start. You should hear a low humming noise. If you can't hear anything, you probably need a new pump, but try the next step before you start buying parts or call an engineer.

2. Open the door and pull the lower basket forward or lift it out completely. Find and lift the float (the plastic dome/mushroom in the bottom of the washer) all the way up. Keep the float lifted and the dishwasher should pump out. Stop if/when you hear a gurgling noise as this means it's empty and pumping mostly air.


B. If your washer is empty of water:

1. Select a wash program and press start

2. Open the door and pull the lower basket forward or lift it out completely. Find and lift the float (the plastic dome/mushroom in the bottom of the washer) all the way up. Keep the float lifted and the dishwasher should pump out. Stop if/when you hear a gurgling noise as this means it's empty and pumping mostly air.

C: If you can hear the low humming noise but the pump doesn't start when you lift the float:
1. lift the float again for about 1-2 seconds then let it drop again for 1-2 seconds. Repeat this 10-20 times and see if the pump starts. The repeated stop/start signals to the pump motor can sometimes free a seized impeller.

If the pump does start, keep lifting and dropping the float switch (1-2 seconds each time) to see if the pump starts every time. If it does, you should be OK to use the washer, but further action is needed to stop the problem returning.

When you've done all this, post the results here and I'll advise you what to do to fix the problem or prevent it from returning.

Posted on Oct 12, 2010

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Posted on Jan 02, 2017

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