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Troubleshooting RV Water Level Sensor Not Showing Full  

Updated 05/27/2020 | Published 05/22/2020

Question:

I have installed Horst Sensors on my black tank. They had worked perfectly . now I have cleaned the tank thoroughly and filled it as full as possible. All three lights come on except the full light refuses to light. I have cleaned the contacts on the top sensor. It still will not light. What am I missing?

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Expert Reply:

You might have disturbed the wiring of the sensors when you cleaned them. When the sensor is grounded it will show the reading so if you ground your highest "full" sensor and it show that it's working that would mean you have a wiring issue with it.

expert reply by:
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Jameson C

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