Filling Problems

• Sometimes the dishwasher won't fill at all, or not enough. Other times the machine won't stop filling and will cause an overflow. For the former problem, first check if the water supply is hooked up properly and turned on. The valve, usually under the sink, should be turned all the way on. The float valve inside the machine could also be dirty and could need cleaning. More serious possibilities include water inlet, pressure valve and selector switch problems. For a machine that won't stop filling, the float switch is probably faulty and requires replacing. It is also possible that the water inlet valve is stuck in the open position.
  
  

Poor Washing

• If your dishes come out looking spotty or dirty, it might not be your dishwasher's fault. Several things could cause this. The most common reason is improper loading. Stacking the washer too full or placing dishes in a way that they block the sprayer arms will almost guarantee some of the dishes won't get clean. Poor water pressure or inadequate temperature of hot water are other possible problems. Using too much or too little detergent for the current load can also lead to inadequate washing or spotting of dishes and glasses. If these aren't the apparent problem, it's possible that the spray arms inside the washer are clogged and require cleaning.
  
  

Leaking

• A leaking dishwasher can damage your floor surfaces. Leaks are typically caused by one of four problems. The main tub seal could be worn out, allowing water to leak during the wash cycle. The door seal could also be dirty or damaged, allowing water to seep out of the door cracks during the cycle. There could be a loose or broken connection at the water inlet valve, or the hoses supplying the water could be damaged. Another possibility is a simple user error. Using the wrong kind of soap can lead to water leaking through the door.
  
  

Noises

• A few possibilities could cause the dishwasher to make unexpected noises. The problem could be with the motor bearings, especially if there is a squeal from the motor area during the cycle. If the seal around the motor is ruptured and water is able to get to the motor, washing away lubrication, the bearing will wear out sooner. There is usually a leak underneath the washer associated with this problem. Other noises could result from a worn-out water inlet valve, causing the pipes to shudder. The heater fan motor can also squeal during the drying cycle, especially if it needs replacement or is rusted or loose.