Bosch SHU3300 dishwasher stuck on hot water intake (w/ no power)
In the middle of the night my dishwasher started taking in hot water. The dishwasher was not on. I opened the door to stop the cycle and the water still ran. I turned off the hot water valve (under the sink). I tried resetting the unit (on and clear to turn off) no improvement. I switched the breaker off but, when I turned the hot water valve the water ran full force. The water is slowly puddling and running out of the bottom (between the unit and floor). I can live (not happily) without a dishwasher but, not without hot water. Did the control panel give out and stick on hot water intake? Help!!! Thank you for your time!!
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It sounds like the float is stuck. Look for a round disk on bottom of dishwasher ( inside) Push it down and lift it up to make sure it is traveling without getting stuck. It is suppose to rise and then cut off water.
The humming noise is either from the pump motor or the water inlet solenoid. One of them is stuck. Take the mopboard plate off the front of the dishwasher and look for the solenoid. It will be a cylinder with two wires attached stuck onto a box in the water line. Start the dishwasher and touch the solenoid with a finger (naturally not the electrical terminals). If you feel it vibrating in time with the hum but do not hear the water running in, the valve is stuck closed. In this case the solenoid may rapidly get hot; that's why you just touch it with a fingertip.
If water comes in and the big motor in the middle starts humming as soon as the fill is complete, then the pump is jammed or the motor bearings are frozen. You'll have to disassemble the pump (from inside the tub) to see what's going on. You should be able to freely rotate the pump impeller and the motor shaft by hand (this is inside the pump; don't confuse it with spray arm, which is spun by reaction from the water spraying out rather than a mechanical connection to the pump motor).
Another possibility is that the water fill level switch is hung up and signaling a complete water fill when the unit is still dry. If this is the case, when you start the dishwasher you may hear the water solenoid briefly, then the pump will start running immediately. Since it has no water, it will just spin at full motor speed. A quick test for this is to pour about a gallon of water into the dishwasher, then close the door and let it run. If it runs normally until it gets to the rinse cycle, then it's either the level switch or the solenoid valve. (Be sure it isn't a pump problem first or you'll have to get the water out while you can work on it!)
Have you insured the unit is connected to a hot water supply line ? The water will not heat until it start's to circulate and activates the "flow switch" in the Bosch dishwashers.
If it is connected to a hot water supply, try running the hot water at your sink taps before turning on the dishwasher. If you still do not have hot water, check your hot water heater or supply.
If it is indeed connected to a cold water supply it will work, just be prepared for very long wash cycles since the Bosch machines will heat the water at a rate of 2F per minute...it could take a long time to reach 155F.
Let me know what you find out and I'll try to assist you in any manner I can going forward.
There might be water in the bottom pan under the dish washer. first turn off the power, then take the kick plate off and you should be able to feel if there is water in there. If there is remove all of it. you can do this one of 2 ways useing paper towel or my pulling out the dishwasher and tipping it 45 degrees. i recomend trying papertowel first and that should get you going again. hope this helps
you need to remove the outside of the door to give you more room remove the six torx screws on the inside of the door sides only do not remove the top ones then the out side of the door will come off on give you room to work on it
Your machine has detected a "flood" condition and has defaulted to its flood mode. Meaning that only the drain pump will work until the flood is fixed.
Bosch D/W's are pretty slick, the entire unit is sitting inside a drain pan that's designed to catch an overflow (flood) keeping the water off of your floor. This overflow pan has a Styrofoam float that rises with the flood and trips the "flood mode". The water in the pan has to be removed allowing the float to drop back down before you can use your dishwasher again.
There are 2 ways to do this... the easy way and the hard way.
1.) Easy way---> Wait a few days. The water will eventually evaporate out of the drain pan all by itself. Takes longer than the hard way, but no tools are involved.
2.) Hard way---> (not actually "hard") TURN POWER OFF TO THE DISHWASHER! Remove the lower kick panels (below the door). Remove the 2 screws holding the water valve in place, and push the valve up as far as you can. Now use a "Shop-Vac" with a long crevice tool attachment. Stick the crevice tool in where the valve was... make sure to reach in there about 8 or 9 inches, (the safety float is in there on the left, you can see it with a flashlight) otherwise it won't reach the water. Now simply suck up as much water as you can. You won't be able to get it all, you just need enough removed to drop the float.
Now try your D/W... after a normal 2 minute drain, it should fire right up.
I have seen this several times, and all of the times it has a bad control board. usually if you take the control board out, you can see a visibly burnt spot on the back of it wher a connection has melted. Another possible slowrun time problem could be that the water coming into the dishwasher when it fills is not hot. If it isnt hot, it takes the dishwasher longer to heat the water to temp, and therfore it runs longer. Is the water coming out of your tap reasonably hot? if not you may need to turn up your water heater settings. But if nobody has messed with the water heater, or the tap where the dishwasher is attached and the problem just started then thats probably not it. Good Luck!