Question about Bosch 23 in. SHU 8805 Built-in Dishwasher
After making more noise than usual our Bosch dishwasher SHU8805uc/14 no longer works. When we select a cycle, press the start button and close the door, the unit only faintly hums: no water enters the unit and it sounds like no moving parts are working. There is no water in the pan below. If I press and hold scrub and regular buttons and press start and close the door, sometimes water begins filling the unit for a couple of seconds and then it stops and just hums. Once when doing this it sounded as if the motor began to run for a few seconds and then stopped, again only a faint hum. If I do it again, sometimes the unit will drain the water from the previous test, but will not run. I pulled the unit out, took off the left panel to expose 2 micro switches. If the unit is set to cycle and turned on I can get it to fill up with water by activating the switch attached to a white translucent vessel. If I then activate the red float switch the unit drains. I observed no leaks.
If this happens at start of the cycle, then it is likely a problem with the water inlet system.
First thing to do is accessing the back of the machine, with power unplugged.
Check the water supply hose, and ensure that water is flowing inside the machine. If the inlet hose is OK, then the problem is likely the inlet valve.
Access the inlet valve and remove hose from valve. Check if hose or valve is blocked. If there is no blockage , then the valve is probably faulty.
the valve can be tested first reading ohms at the solenoid contact with a multimeter, and energizing the valve to see if it close and open. Also reading valve volts can tell you if problem depends on valve or timer control board.
The last two test involve reading values and operating valve with live power. For safety reasons they must be done by an experienced repairer.
You can find parts and diagrams for many appliances here.
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Posted on Jun 18, 2009
Hi.this seems like a multi-dimensional issue but, its just a control fault. the control unit has failed. the logic chip set is damaged. these chips are responsible for initiating the correct wash sequence. this control unit should be replaced in order to restore normal function to your unit.
Posted on Jun 19, 2009
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Posted on Jan 02, 2017
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