My siemens hydrosensor just keeps washing forever. it will go on for 4 hours if i let it.

Possibly the top or the side of the door.

Probably not. Most likely the plug, or cord is bad. Have you had a power surge? If so, no telling what happened.

You cannot fix it since you may not have the knowledge to do so. Maybe all that is needed is a new timer, but only a trained tech can determine that.

If your plumber has looked at it and said hydrosensor is faulty then replace hydrosensor, or get a new dishwasher. Just compare cost of fixing or replacing.

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It sounds like the door switch is at fault, it will cause the symptoms you stated.

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It is obvious the drain or pump out is not working. There is a blockage in the outlet. Check the drain under the sink nby removing the hose and making sure the hole is not blocked. The pump in the dishwasher may be blocked. fixing this may not be within your field of expertise and a technician may be needed. Good luck

See:

http://www.siemens-home.com/pdf/sl84a30xuc_manual.pdf

There is a pic with the buttons in there.

I hae a siemens XLM 1200. The clothes are not smelling clean, they smell of stale water.

Paul

If you are still trying to sort out this issue try the following.

From what you say then it is most likely the aqua sensor on the side of the dishwasher. The gurgling sounds that you hear are likely the drain pump running and the un-drainable water sloshing in the sump.

Verify that there is actually water going to the dishwasher( Basic step but often overlooked)

Next the inlet valve will have to be checked. This is the part where the water line from the house connects to the dishwasher, under the toe/kick panel. Remove power from the dishwasher. Disconnect the dishwasher electrical connections (2 wires) to the inlet valve and connect it (carefully to 110 V power) using a jumper wire. With 110V power the valve should open and water will flow into the dishwasher, if not then the fault is in the inlet valve.

If this checks fine then the fault is likely in the aqua sensor...

On the outer left side (viewed from front) there is a panel, Behind this panel there is a small clear(of light blue) plastic mechanism with hoses and wires attached( There is usually a yellow disk at the top about 6cm in diameter) this is a float and sensor assembly there is tells the control the water level and works as an emergency drain if there is an issue. There will be a red stick protruding downward to the base and a Styrofoam float on which the stick rests. This is a pan overflow sensor if the stick is too high the unit will go into drain and cut off the fill valve power. The yellow disk is a diaphragm which senses water height. This unit can become stuck with wear and hard water.