Is the rinse aid gauge registering incorrectly?
Make sure that you are reading the gauge with the door in a fully opened position. The gauge only registers correctly when the door is in the fully opened position. If the door is tilted on an angle, you will not get an accurate reading.
How to read the indicator gauge.
The 3 indicator lenses are located beside the rinse aid fill cap. The largest lens showing the color of your rinse aid indicates that the rinse aid reservoir is full. As rinse aid is used, the lens will start to show a clear or silver color. When the smallest lens is showing a clear or silver color, it is time to refill the dispenser with rinse aid.