Kenmore Dishwasher Error Code 6-3

Code 6-3 means the control board detected suds or air in the pump during the wash cycle. This can be caused by excessive sudsing from the wrong detergent, rinse aid leaking into the tub, bowls trapping water and starving the pump, or a missing diverter disk in the sump assembly. The dishwasher stops normal operation to protect the pump from running dry or under abnormal load.

Running the dishwasher while a 6-3 code is active is not recommended. Air or suds in the pump can cause the circulation pump motor to run without adequate water, which generates heat and accelerates wear. The machine will also not clean dishes effectively in this state. Resolve the cause before running a full cycle.

If the cause is wrong detergent or a loading issue, there is no cost. A replacement rinse aid dispenser cap runs roughly $10 to $25 and is a DIY-friendly swap. A new diverter disk is typically under $20 and requires no special tools to install. If the pump itself has been damaged from running with air or suds over time, pump replacement ranges from $80 to $150 for parts, plus labor if you use a technician.

Start by letting the unit fill and run for about one minute, then open the door and look for heavy foam inside the tub. If suds are present, check that you are using automatic dishwasher detergent only and using the recommended amount. Also inspect the rinse aid dispenser cap for cracks or overflow. If sudsing is not the issue, remove the lower rack and spray arm and inspect the diverter disk in the sump - if it is missing or broken, replace it to clear the fault.

Yes, the diverter disk sits in the sump and routes water to the spray arms in the correct sequence. Without it, water flow is uncontrolled, air enters the pump, and the control board flags the abnormal pump condition as 6-3. The diverter disk is a low-cost part, typically under $20, and can be replaced by removing the lower spray arm and filter assembly to access the sump.