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Old 07-05-2010, 09:42 AM   #1
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fresh water level not working

HI, everyone. On my 2006 discovery the fresh water tank level is not reading correctly when it shows half is pretty much empty, as anybody experience the same thing on they're motorhome, thanks in advance Joe.

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Old 07-05-2010, 10:04 AM   #2
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First, you have to be level. My fresh water tank is currently empty, but "reads" 1/4 full. I currently have a slight list to port, intentionally facilitating black tank drainage and and air conditioner condensate drainage.

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Old 07-06-2010, 10:29 AM   #3
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Does your level indicator read correctly in other levels? Full and empty should be pretty easy to verify. If it does it is probably a bad sensor.
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Old 07-06-2010, 05:47 PM   #4
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I've given up on using the level indicators.

Water is easiest.
Lift the bed and shine a flashlight through the top of the tank. et voila!

Black & Gray are harder.
For now I'm using a post it note on the panel with deate of last dump.
So far it's working out OK>
Bryan. 2000 Georgie Boy Pursuit.

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Old 07-06-2010, 08:27 PM   #5
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Originally Posted by MaverickBBD View Post
Does your level indicator read correctly in other levels? Full and empty should be pretty easy to verify. If it does it is probably a bad sensor.
Now you got me thinking, I think that the other ones are good at least when they are empty they read empty.
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Old 07-07-2010, 06:13 AM   #6
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The fresh tank gauges usually read pretty accurately, so I'd guess you have a shorted sensor or maybe a bad display panel. It's possible there is some algae build-up in the fresh tank, however. Have you santized it recently?
Gary Brinck
Former owner of 2004 American Tradition
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC
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Old 07-07-2010, 12:59 PM   #7
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At the suggestion of Hooligan, another owner of a chassis similar to ours, I cut a hole in the wall of one of the compartments where I could physically see the FW tank. I put a heavy piece of plexiglass over the opening to keep it tight for the winter protection.

My 60 gallon FW tank is actually two 30 gallon tanks, tied together with hoses. The sensors are on the "downstream" tank. What this means is that the tanks have to equalize through the hoses before the reading is anywhere near close. I've had water flowing out of the overflow and saw the tank gauge showing 1/2 full at that precise moment. I recognize that yours is the opposite problem and may be a different cause.

The sensors work by the bottom wire (ground) connecting with the other sensors through the water to turn on the indicators. There are more sophisticated sensor arrangements that can be retrofitted on existing tanks to provide a more accurate reading. As I remember when I looked at them, the least expensive was around $250. I decided that with my two tank arrangement, those sensors were not going to boost my accuracy much and didn't make that investment.

2000 Georgie Boy Landau 36' DP
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Old 07-07-2010, 01:29 PM   #8
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Perhaps the FW gauge just needs to be adjusted. Ck it to see if there is a slot by each gauge, and if there is, when the FW is empty, push to ck it, and turn the slot until the gauge shows empty. Or, for each gauge, do the same to try to get them to read correct. I gave up on ours reading correct a long time ago. They have been adjusted, and still go crazy from morning to afternoon.
Al, Michigan 2003 Mountain Aire.

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