imq707s wrote:
It constantly shows empty for both the grey and black water tanks. Is it common for them to stop working? I don't want to have to rely on water backing up into the tub to tell that the grey tank is full.
Checking actual capacity using a container of known volume is a good idea.
So you are saying you only know when the grey tank is full simply when the tub backs up? Sensors should not stop working, but they RARELY read correctly.
Does the Zinger have an enclosed underbelly? Doesn't look like it from the manufacturer's website.
If you can get to the tanks, check the wires between the indicator panel and tanks sensors. Pull the indicator panel off the wall and disconnect the wires that come from the sensors. (Mark them so they go back on in the right spots). Use some alligator clips (or use a small clamp and short out all wires at the tank sensor and use an ohmmeter to see if there is continuity between all 4 wires. If there is no continuity you'll need to find out why and repair or replace. The wire is very small gauge and easily damaged. One wire/sensor is a common and a bad connection in that wire can cause all 3 level LEDs to stop working.
If the continuity test is okay then the LED display panel is faulty.
A sensor wiring diagram is below. The 2nd photo shows a standard "button" sensor/probe. If you can see the tank, check to see if the sensors are mounted at the correct heights - see diagram below.
KIB has a troubleshooting guide
here.
