maryfilen
The monitor reads empty status and then will eventually jump to 2/3 full. Any ideas why that might be? We think the trailer is fairly level based upon the levels that we are using. .
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mkevenson
Mary, good question. IMHO the monitors are generally unreliable as a whole. Some of them may work accurately but I don't put much store in them. It seems this is quite common. I suspect that the sensors attached to the grey water tank are faulty, dirty or for some other reason are not properly sensing the grey water level. One sure method to determine the grey water level is look in the shower. If water is not coming into the shower from the grey tank, it is not completely full. Sounds odd but this is the method used when there is no monitor. Fresh water levels can be seen by looking at the tank, since is opaque. Black tanks can be determined by looking in the toilet with water turned off.
You may find more reasons from others but this is my experience.
Mark
Please buy Made in USA
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kevinkpk
Mine does the same, as posted I either keep a general idea of how much water I use, or with water off, look down toliet.
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sjmiller
We have the same issue, and use the above mentioned methods as well.  Wish the monitor gave more reliable data.
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maryfilen
Thanks, it was accurate the first few times, but now that the trailer is almost a year old it is not. Thought maybe a sensor went bad, especially since the fresh water and black tanks are reading accurately.
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mikes
The level sensors are just stainless bolts going through the side of the tank at different levels. The display has electronics which sense when they're in contact with water, and light the appropriate lamp. The fresh water sensors are usually good - they stay clean. The black water sensors are usually first to be wrong, they get TP and other stuff stuck between the sensors, which shorts them together. Gray tank ones are in between.

If the reading jumps from 0 to 2/3, it probably means something is shorting between the 1/3 and 2/3 sensors - as soon as the water reaches the 1/3 one, the 2/3 one also detects it.

For black water tanks, you can often use a cleaning wand stuck down the bowl to spray a water jet against the sensors and get them clean/working. Gray is harder, since you can't get past the drain traps. They make spray things which mount to the side of the tanks and connect to a hose which sprays all over to try and clean them - may or may not work. Using RV gray water tank cleaner may help, as may an ounce of dishwashing soap, getting the tank half full with clean water, and driving around a bit.
Mike
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2ty
Sounds to me like the wire going to the 1/3 sensor is broken.
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