I installed the See Level system on my previous coach and it worked for 8 years flawlessly. Never had an issue.
I did damage the fresh water tank sensor strip on the Allure and got a new one from RVUPGRADES and it has worked just fine. So far the system has worked without a hitch. I did have a problem with the Techma sensors on the BW tank (yellow stayed on even when See Level showed BW tank empty and I had just dumped the tank) but that finally cleared up after using some white vinegar in the tank.
Have you checked the wires going to the sensors? Or, are any of the sensor strips starting to release from the tank side? It is imperative that they are stuck fast to the tank side to be accurate.
I believe See Level folks told me (when I called about the strip I damaged), that the strips over time can start to release and give false readings. Replacement strips are not expensive. RVUPGRADES had a good price on them.
'07 Country Coach Allure 470 Siskiyou Summit #31578, Cummins ISL 425; 2014 Ford F150 toad; Air Force One Toad Brake.
Glen Allen, VA; Smith Mountain Lake, VA.