Question about Bosch Dishwashers

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I have a Bosch dishwasher, probably 20 years old. SHU9952UC generation. Won't fill with water. Have changed outlet valve and sopped up water in the overflow dropping the float. All lines clear.

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  • Simon Combe
    Simon Combe Jan 11, 2019

    Yep. These old Bosch dishwashers are great reliable machines. I bought one for $200 from a kitchen renovation sale about 10 years ago (the best dishwasher I have ever owned).
    When it comes to filling the machine with water the solenoid can be an issue. It can corrode and start playing up. The replacement part is cheap and easy to replace for someone with a bit of mechanical/electrical skill. However, be careful during installation as to not to disturb the rather complex tubing arrangement and float setup on the left hand side of the machine (Remove the cover and you will see what I'm talking about).

    Generally with dishwashers there are certain times when you need to say goodbye. Water in and out are pretty easy to solve. Main seals, motors, computer boards can be a nightmare. If the machine is in warranty then do not repair it yourself, you will void the warranty.
    Always isolate the machine from a power source when you are working on it. Water and electricity do not mix.
    Hope this helps

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It's time to let it go it's had a good innings old chap

Posted on Oct 09, 2018

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  • Bosch Master
  • 304 Answers

Hi!

Please check the manual to a Bosch dishwasher. Hope it will help you find a solution! https://manualsbrain.com/en/manuals/1259888/?page=15

Posted on Oct 09, 2018

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Posted on Jan 02, 2017

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SOURCE: Not enough water

Be aware that you should remove dishwasher's power cable before touching wires or making resistance measuring !!! Check that the inlet valve get power. In case it does and no water entering the tub, check with multi-meter for solenoid's resistance (disconnect first the wires to it),if no measurement result, you should replace the valve. In case you have a measurement result, remove the solenoid from the valve and check that it's clean from any dirt. In case there is no power to the inlet valve - check that the float switch works. This is usually a small switch attached to a float. The float (usually a cylindrical) located inside the dishwasher at the bottom. As the water level rises, the float rises too. When it reaches the certain height, the float activates its switch, which cuts the electricity to the water inlet valve. If the switch is defective (stuck in the disconnected position)it will prevent power from the inlet valve. The switch is an On/Off switch and you can check it easily by a multi-metr. Good luck !!

Posted on Jun 08, 2006

  • 105 Answers

SOURCE: bosch classixx dishwasher not draining

try removing pump some models can be serviced fron inside well of machine glass can stop the pump from turning
clean out water and remove filters find a screw in base of well remove and remove pump housing check with torch to see if any obstuctions there if not see if the impellor moves around when turned and make shure that the pump is not worn out

Posted on Feb 24, 2008

  • 1 Answer

SOURCE: electrolux esl 6251 built in dishwasher 2 years old

PROGRAM WONT RESPOND MACHINE NOT STARTING

Posted on Apr 11, 2009

shadtremonky
  • 353 Answers

SOURCE: Directing excessive condensation andor water

insulate and seal

Posted on Jul 01, 2009

localwonder
  • 6784 Answers

SOURCE: Our bosch dishwasher is not getting water. The

HI. This is true. The float mechanism can prevent the filling process, if it is stuck in the overfill position. Although this issue has several areas of concern, this will be a good place to start.

To inspect the float assembly, open the dishwasher and remove the bottom rack. Remove the float cover (if any faults exist, it can be identified by the fact that the cover does not move up and down). The cover may snap in place or it may be fastened in place with a screw.

Lift and drop the float several times. It should move freely. If the float sticks, it may prevent the dishwasher from filling or draining properly. Remove the float and look for obstructions that may interfere with its free movement. The float usually snaps in place. If it does not come off with a small force, it may have to be disconnected from the float switch first.Replace the float and float cover. If you found no obstructions and the problem persists, test the float switch.

Use a multimeter to test for continuity. Set the multimeter to the ohms setting X1. Touch one probe to each terminal. You should get a reading of either zero or infinity. With the probes still in place, depress the button or lever on the switch and the reading should change to the opposite extreme. If the switch fails either test, it should be replaced.

Now, that covers the floater. If the floater is ok, and operational, move on the the water inlet valve assembly. This will be the most common issue, in this case.

First, Make sure you are receiving water at the dishwasher. Check to see if the water shut-off valve (located under the sink) is open. If you are getting water to the dishwasher, but there is still no water inside during the fill cycle, the problem might be with a faulty water valve


To access the inlet valve remove the lower panel located beneath the door. The panel is usually held in place with two screws either above or below the panel. It may be necessary to first open the door to the dishwasher to reach the screws over the panel, then close the door to remove the panel. The water inlet valve can be identified by the water hoses connected to it. One hose will lead from the valve to the pump/motor assembly in the center of the dishwasher. Check that the hoses are securely connected to the valve and that there are no kinks in the hoses which could restrict water flow. There are two wires (four, if it has two solenoids) connected to the water inlet valve. Label the wires and connections so that you can properly reconnect them later. The wires are connected with slip on connectors. Firmly pull the connectors off of the terminals (do not pull on the wire itself). You may need to use a pair of needle-nose pliers to remove the connectors. Inspect the connectors and the terminals for corrosion. If either is corroded they should be cleaned or replaced. Use a continuity tester or multimeter to test for continuity. Set the multimeter to the ohms setting X1. Touch one probe to each terminal. A reading of infinity indicates a bad solenoid that must be replaced. Different brands and models will have various measurements, but the valve should show some resistance if it is functioning properly. If your valve has two solenoids, test the second one in the same way as the first.

Replace the valve if it fails the test.



Posted on Dec 10, 2009

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