[commodor47]

Dennis,

I found two things that tend to help clear the pesky gray tank level sensors. One is to use a water heater tank cleanser. First drain the gray tank then leave the valve open and the cap off. Next insert the water heater cleanser wand, keeping the curved end facing into the tank, and force water back into the gray tank. Hold the wand as far into the tank as possible without risking detaching the narrow tube. Forcing the water into the tank at high velocity causes it back up usually far enough to clean the sensors. You may need to do the rinse several times.

After the cleansing I test the tank level and noticed one or more of the LED lights may be lit, but depressing the test button for 5 to 10 seconds the light(s) will slowly dim and go off. This step may need to be done a few times. Maybe the small current passing through the sensor is enough to dry it off? Not sure why it tends to work but I have had good success.

Dick