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How Come The Holding Tank Gauge On Our RV Always Reads Full?

by Anonymous

Waste tank 1 reads full when empty.

ANSWER: Thanks for submitting your question on our Ask An RV Question Page.

This is a common problem for a lot of RVers. The gauges not showing the proper level in your holding tanks could be due to the probes used to measure the waste level in the holding tank being dirty which causes them not to work. The first thing you can try is some RV Probe Cleaner and see if that gets the probes working again. Do not use probe cleaner in your fresh water tank.

Other RVers have had good luck by dumping some original Dawn Liquid Dish Detergent in their Black and Grey Water Holding Tanks. The Dawn seems to break up all of gunk on the probes. Again, do not use the Dawn in your Fresh Water Holding Tank.

Sometimes dumping a couple bags of ice cubes into the holding tank and driving the RV around will help clean the probes.

If none of the suggestions above work, there could be other problems causing the gauges not to work, such as a bad sending unit, a bad gauge, etc. In those cases you would have to have a Certified RV Technician diagnose and repair the problem.

Leave your RV repair bills to us—Good Sam Extended Service Plan

Some RVers just give up on the tank gauges ever giving accurate readings and have become pretty good at just knowing when to dump the tanks.

Hope this helps.

Do you have any suggestions or comments on this topic? You can add them to this page by clicking on the "Click Here To Post Comments" link located near the bottom of this page.

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Happy RVing

RVing Al

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by: RVing Al

Here is a comment on this topic from The Everything About RVing Facebook Fan Page.

Ernie Hall: Sounds like the sensor in the waste tank is covered, more than likely by some toilet paper.you will want to get a flexable tank wand or a master blaster tank wand to help clean out the tank, to remove any extra matter stuck to the bottom of the tank

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