Hymer water guage problem

[cliffanger]

The fresh water level on our guage is continuously reading 100%. I thought the sender unit in the tank might be defective or dirty, but the grey water reads ok on the guage - what is puzzling me is when I pulled out the multi plug on top of the tank I was expecting the fresh water to read zero on the guage but it still reads 100% - any ideas anyone?

 

[wizzer59]

Always take what it says on my gauge with a pinch of salt anyway, I usually lift the hatch and take a look that way I know for sure if I can have a shower or its flannel time again

Other than that I'm no good to you whatsoever

 

[Tootles]

I suspect.....(he said, standing by for a good kicking), that 100% showing is indicating maximum resistance.......As though you had touched the two cables together. If that's the case when you unplug, it may indicate a wiring or a gauge fault.......

 

[cliffanger]

How's your van going Tim? We were the ones who nearly bought it from the chap in Bristol, before it was sold and went to Scotland where you bought it!

 

[cliffanger]

Still flummoxed - the waste gauge is working and showing 25% so to do a comparison we disconnected the Multiplug on that gauge expecting it to go to zero but it still reads 25%, so things are not quite as clear cut as him indoors thought it might be......

Had anyone had a similar problem?

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[Lenny HB]

First step is take the sender out and dunk it in a solution of hot water & white wine vinegar (30% vinegar ) white vinegar works but not as well. That will clear any calcium build up off the probes, with any luck it will work. Also you could could swap the sender with the one on the grey tank, just use a jug of water to dunk the senders in, easier than filling & emptying tanks.

 

[Reallyretired]

If your tank reads 100% when the sender is disconnected then there is either a short circuit in the wiring or the electronics at the control panel. As the waste guage is also reading incorrectly , it should go to 0 when disconnected, I suspect the control panel.

These gauges are never very accurate at the best of times.