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The dishwasher is not working. When the cycle is finished the dishes are still dirty and the soap is lying in a pile at the bottom of the washer still dry. It is a GE Medallion 850 Model#GMB8240KD119. how old is this model? Do you recommend fixing or replace?

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The float switch may be the problem so open it up and clean it. Debris can cause the float to stick in the raised position, which prevents the tub from filling which appears to be your problem. If the water doesn’t reach the right level (just covering the heating element), the dishwasher won’t clean well. On most models, you’ll find the float switch in the lower front of the tub. Some have a cover, but some don’t. You may have to use a small, flexible brush or pipe cleaner to clean those without a removable cover. When clean, the float should slide up and down freely. It can also be a clogged intake valve screen. So before going through the somewhat more complex steps for cleaning the intake valve screen, check the water level. Close the door, turn on the machine and run it until it’s done filling during its second cycle. Then open the door (the machine will automatically shut off), and check the water level. If the water doesn’t come up to the heating element, it’s too low. Close the door and let the machine cycle on through. Then proceed to clean the intake valve screen. You’ll have to unhook several wires, so always begin by turning off the electrical power to the dishwasher at your main panel. Turn off the water supply to the dishwasher as well. Usually the shutoff is at the hot water supply line under a nearby sink.
The inlet valve is usually mounted on the underside of the dishwasher near the front. You have to remove the lower panels and disconnect the valve to get at the valve screen, a wire screen mounted within the body of the valve itself. If the wires don’t pull off readily, push the small spot in the center of the connector to release them. And mark one wire and its terminal with tape so you can get them back on the same way.
TIP: Keep a rag handy. You’ll have to mop up a bit of water when you unhook the copper supply tube.
Some pros prefer to simply replace the valve on old machines to avoid problems in the near future. New valves cost about $15 for most machines. Look under “Appliance Parts” in your Yellow Pages for sources. Stick the end of the supply tube into a pan and turn on the water supply briefly to flush out sediment before reconnecting the supply tube. Put everything back together and see if this helps.

Posted on Sep 30, 2009

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Posted on Jan 02, 2017

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