Bosch DW doesn't start/panel doesn't light up/but unit has power
This is a SHU43 series DW - stopped draining and now won't start up even though we tested and unit has power. I cleared the water out and checked the filters, which were clear. Do I need to call a plumber, a repair person, or are there a few simple things I can do myself. For example, is there a reset button? should I pull the unit out and try to unclog a drain & even if I do, how do I get the DW to start again?
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Hello, welcome to Fixya. Actually an error code "1" refers ONLY to a heating error. I'm not sure what you've based your info on, but "1" being displayed has nothibg to do with a water fill/level issue what-so-ever with any Bosch dishwashers. Here's how to perform a test or diagnostic for the "shu43" series Bosch to determine once and for all the problem you're having though. Make sure the power button is in the off position ( open & closing of the door will activate the "auto shut off" ). Once certain it is "off" press and hold both the regular button and rinse & hold button, then turn the unit "on" while continuing to depress those 2 buttons. Initially, control module version # will display ( i.e. "20" = version "0" without jumper...not important for this ). When the buttons are now released, the lights above them will flash. To start testing, press both the "regular wash" and "rinse & hold" a second time. Let the test follow through. When testing has ended, the display will show an error using codes as follows. "0" = no error. "1" = aqua sensor fault. "2" = heating fault. "4" = filling fault. and finally, "8" = NTC ( temperature sensor ) fault. If it where related to a fill/level error you would see the letter "F" during washing but the # 4 in diagnostic's. Similarly for a heating fault, the diagnostic will identify a #2 but the "1" appears during normal washing. Let me know if I can assist you further. Hope you found this helpful and if so please allow for a positive rating. If there is anything not clear let me know and I'll try to expand on the info I posted. Good luck. Macmarkus :)
Hi and welcome to Fixya. Based on your post, I would start by first shutting off the breaker. Then removing the kick plate ( access panel at the bottom ) and checking the wiring at the junction box for the dishwasher 120vac supply line. Remove the murret's and visually inspect the wire for "resistance burn" and strip the wires back and install new fastener's if necessary to repair. This is actually quite common to find a wire connector come loose due to improper fastening and once the unit is in use for a while the connections heat & cool, become loose from normal operating vibrations and burn up from all the added heat caused by "resistance". The end result is no power to the controls. Check it out and post back what you find. Thanks for visiting "fixya" and please take a moment to rate the solution/suggestion provided here for you. Good luck. Macmarkus :)
On a Bosch dw, it has a light sensor to sense soil in the water.. if the control feels that the water going through the sensor is not clean/ or clean it will add or minus time..one thing you can do is make sure that your drain line from dw to sink drain is cleared of debris.. also, make sure you clean the filter at bottom of dw and make sure its reinstall correctly if you haven't already do so.. if your dw finish the cycle and come out clean, then the time on your dw is fine,, but if it don't finish and come out dirty.. then, it could be something other, but don't know til I get the full details on problem.. help this will do it for ya.. good luck.. mike
Need a little more info.. anyway.. open dr will shut off dw...close dr.. push power button until power on... lights on, but nothing happen.. try holding down drain and one of wash cycle.. repeat holding drain w/other buttons until you hear drain pump running.. make sure you hold both buttons for a few seconds.. if your drain pump works.. then, you might have a problem w/your wash motor or something is stuck in the impeller area.
Intrrnal leak into base of appliance will make drain pump run constantly.
If appliance fills then dumps water with drain punp then keeps filling/draining sequence then the flow meter could de faulty.
Call in engineer.
Paul Winn Appliance Services (Cumbria)
You have water in the base of the machine. There is a flood float in the bottom so if any water gets into the base, it will shut off the water and run the drain pump as long as the power button is on. So shut off the breaker, remove the toe kick, and remove any water that is down there. Now start the machine and see if water is leaking into the base. If there isn't any water, an the dw is still running the drain pump, then with a wooden spoon raise the red plastice stick on the left side of the dishwasher up and down. It is possible that the overfil float is stuck. If this makes the dw start filling, then run cooking oil thru the dishwasher on the scrub cycle to remove excessive detergent. If you are in hard water, then the water deposits have caused this. Run citric acid ( Tang orange drink, Dishwasher Magic, or such) thru the dishwasher to remove this.
when facing the dw pull it out from under counter and on the left side there is a panel held on with 2 screws. take that off and under there are the float switches for the overflow. those switches is what causes the pump to run all the time but do nothing else.