Fresh water gauge

LOFAT36 wrote:
I heard year's ago ( in another life) that baking soda or powder in the FW tank might help. Any comments ?

I very highly doubt it would help. The problem is almost certainly not in the tank; there's not much in fresh water to cause buildup on the electrodes. (The most likely thing to build up that I can think of would be mineral deposits, and those would generally need something acid to get rid of them, not alkaline like baking soda.)

You would end up with nasty tasting water.

I heard year's ago ( in another life) that baking soda or powder in the FW tank might help. Any comments ?

Sorry, I need to correct my earlier post. The FW tank light does come on but it always registers empty. Never changes.

These systems typically have a few electrodes on the tank that connect up to something (stepped resistors, I think) encased in an epoxy blob, which also has a couple wires going back to connect with the bargraph display panel.

Likely culprits in my estimation would be the connection to the lowermost electrode(s) in the tank, one of which is the common for all of them; connections between the blob and the control panel; and possibly a problem with the control panel itself.

It might be easily possible to temporarily swap the connections for one of the working tanks and the fresh water tank to see if it's the control panel circuit or the wiring or probe connections.

I would first check at the back of the switch plate and make sure the wires are properly fastened. And while there, I would check for power.

Lights don't light up at all on my panel for my fresh water tank. Both my grey's & black tank no problem.

Fresh water gauges are usually pretty accurate. As accurate as you can be with 4 lights. It's the waste tanks that aren't accurate, due to sludge, TP, etc fouling up the sensors.

By "not working", do you meant that the lights don't come on at all, or not change?