Question about Miele Dishwashers
I have a Miele dishwasher I don't know how old that "surges" (pulse of water, then silence, then pulse of water, then silence) and then later in the cycle, it is really loud and squeaky sounding. The noise is getting louder. There is still a little water in the drain pan on the bottom after every cycle, and I check the backflow valve, which seems to be working fine (it spins). The dishwasher installation was not to code, there is no air gap nor extra loop in the drainage pipe - which I've been meaning to fix too. It is a built in, attached with just two or so screws.
This sounds like a bad timer. The timer is what tells the pump to drain at specified times. If it gets a bad contact, that timed cycle won't happen.
PS: Do you know for sure that the drain is occurring in mid-cycle? If not, you may just have an obstruction in the drain and/or anti-siphon valve (where the hose connects under the dishwasher.
Posted on Jan 03, 2008
Seems you answered your own question here. You need to make an air gap in the drain hose - take as much slack as possible and make a curve (upside down U) under you sink as high as you can go. Make sure you clip ot to back of the cabinet to stabilize it. Good luck
Posted on Feb 25, 2010
unplug where the dishwasher drains into your garbage disposal and visually assure by looking in that hole that there is no build up there. You could have a partial blockage either at this spot or in the drain line itself. I do tend to find this alot for people that do put there coffee grounds down there garbage disposal. If you have looked and checked the entire drain line and drain port that goes into the disposal one of the next places you would look would be to assure that the float switch is activating the switch in the right postion and is not bent. Also on the inside of your tub you will see the float itself this connects to the float switch which is located on the underside of the tub usually to the right of the water inlet valve. If the float switch checks out well then you would look at the drain pump itself and remove the pump from the unit and use a extension cord that you would cut the female end off and add two electrical connectors to which by doing this you have just created a powered jumper wire. You can then connect the two connectors to the pump and the other end to the wall to visually see the impellar on the inside of the pump functioning. Also before removeing the pump sometimes I also find that on some units the way the drain hose is run is the issue as well where as it should be higher then the port hole on the disposal and not just run along the floor and then right to the disposal. If anything it should be run upwards to the highest point of the underside of the sink and then connected to the disposal which causes a better vaccum in the drain line and the pump doesnt have to constantly be pushing the water upwards. If you have any further questions message me back I await your reply. Please also remember when our chat has fully concluded to rank how this opinion has helped in your appliance situation it allows me to continue helping others in similar situations in the future. Thanks again
Posted on Sep 13, 2011
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When the Dishwasher won't fill you'll need to check for the water inlet hose, the water inlet valve and the float switch assembly. When the water fills your dishwasher, a float rises along with it. As the float reaches a certain threshold level, it shuts off the flow of water, thereby preventing a leak. Sometimes the float can get stuck in the wrong position in your dishwasher, and it can prevent your dishwasher from filling. Sometimes it can happen due to float valve and on other occasions due to float switch. Inspect the water hose coming to the dishwasher for any blockages. If the hose is not clogged then check the water inlet valve for any clogs, if the water will not even fill for few seconds then certainly the water inlet valve is bad and should be replaced. You can also use a multimeter to check continuity on inlet valve. If you don't get any value on the multimeter then you'll need to replace the water inlet valve assembly. However, if the valve is fine then the float switch assembly should be replaced. Hope this helps... Please post back if you need more information.
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