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Old 05-27-2022, 12:42 AM   #1
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Tahoe Vista , California
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Holding tank sensors with no readings at all

Hi all! After de-winterizing last weekend, my holding tank sensors have no readings at all. I am used to them misreading and giving faulty tank level info, but neither the black or gray water tanks read anything now.

Anyone have an idea of why I would be not getting any waste tank level readings? (Fresh water tank levels read properly)

Thanks!
JJ
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Old 05-27-2022, 05:54 AM   #2
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Stupid question, but I am assuming you have plenty in the black and gray tanks?

SPP
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Old 05-27-2022, 07:55 AM   #3
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Welcome Aboard...👍

I learned to think about it like this...how long could I continue to work if I was covered in poop half my life?

I did the GeoMethod once years ago.
Now it's 1/8 cup Dawn and Happy Camper after every dump and through flush.
POI all our sensors are still working....

Bob
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Old 05-27-2022, 08:16 AM   #4
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No Readings ? no power? = could be a fuse.
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Old 05-27-2022, 08:20 AM   #5
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The connector for the black tank sensor (at least on my 19) is located on the outside plumbing that feeds into the dump valve. This connector is subject to all matter of road debris and moisture. Mine rotted out after about 3 years and while I have a pretty good feel for how long we can get by, a quick check with peek down into the tank is a pretty reliable monitor.
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Old 05-27-2022, 08:22 AM   #6
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Thanks all!
SPP, the black water tank was not very full, but the gray water tank was completely full and overflowing the shower just a bit.

Bob, I will give that geo method a try. I did use some cascade dish washer detergent in the full gray tank and drove around for about an hour but it did not have an effect.

I guess my concern is that there is no readings at all. I thought that if the sensors were covered with “stuff” they would still read out tank level info, just not accurately.
Sounds like you all are saying that no readings at all could also mean the sensors are clogged up?
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Old 05-27-2022, 08:28 AM   #7
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Laurence and John, thanks! I am thinking it is more something like one of those issues as I am not getting any readings.

I didn’t even think about a fuse blown. Would that fuse just run the black and gray water tank power though, or would it also run other electronics as well? I don’t notice anything else electrical not working.

As for the sensor connector that is curious. Is there the same type of sensor for the gray tank as well? What are the chances both went at the same time? Definitely a possibility.

Thanks guys!
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Old 05-27-2022, 09:45 AM   #8
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Me too

I am having no reading at all. Whole unit not lighting up. Anything to do with on and off switch on battery disconnect?
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Old 05-27-2022, 09:53 AM   #9
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I use a mix of Dawn Ultra dish detergent and liquid Calvin water softener. I understand that the inclusion of the liquid Calvin is particularly important when hard water is in the tanks.
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Old 05-27-2022, 09:53 AM   #10
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Me too and…

Nothing on inverter circuit coming on. Shore power OK.
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Old 05-27-2022, 11:29 AM   #11
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Sounds like nice to me!
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Old 05-27-2022, 11:42 AM   #12
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Good Advise

Good Advise,

We found the dawn soapy dish water down the black tank does a great job between clean outs while traveling


Quote:
Originally Posted by ROBERT CROSS View Post
I learned to think about it like this...how long could I continue to work if I was covered in poop half my life?

I did the GeoMethod once years ago.
Now it's 1/8 cup Dawn and Happy Camper after every dump and through flush.
POI all our sensors are still working....

Bob
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Old 05-27-2022, 06:38 PM   #13
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Quote:
Originally Posted by Double J View Post
As for the sensor connector that is curious. Is there the same type of sensor for the gray tank as well? What are the chances both went at the same time? Definitely a possibility.

Thanks guys!
When at the same time means "during months of winter storage" the odds of both at the same time increases.

I believe Peggy Raffer meant MICE chewing wires which is another possibility.
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Old 05-27-2022, 07:36 PM   #14
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It would be useful to know the age of your trailer because that can have a lot to do with no readings.

Our 2002 came with simple electrical contacts. Airstream then changed to the Micropulse system and then to the SeeLevel system. Of the three, the SeeLevel system is, by far, the most accurate and reliable. The reason is that the sensors are on the outside of the tank and (unless solids are stuck to the side of the tank with the sensor) problems with the system would most likely be wiring- or fuse-related.

Tim
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Old 05-27-2022, 10:39 PM   #15
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Quote:
Originally Posted by Tim A. View Post
It would be useful to know the age of your trailer because that can have a lot to do with no readings.

Our 2002 came with simple electrical contacts. Airstream then changed to the Micropulse system and then to the SeeLevel system. Of the three, the SeeLevel system is, by far, the most accurate and reliable. The reason is that the sensors are on the outside of the tank and (unless solids are stuck to the side of the tank with the sensor) problems with the system would most likely be wiring- or fuse-related.

Tim
Thanks Tim! It is a 2009 25’ Flying Cloud. I am not sure what kind of sensor system it has. I will check out the owners manual to see if it is in there. Do you happen to know what type of senses airstream was using in 2009?
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Old 05-28-2022, 05:28 AM   #16
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Quote:
Originally Posted by ROBERT CROSS View Post
I did the GeoMethod once years ago.
Now it's 1/8 cup Dawn and Happy Camper after every dump and through flush.
POI all our sensors are still working....
Same. We used the Dawn & Happy Camper and had fully functioning sensors on our previous SOB for 3 years. I'd stay away from adding bleach as that can have a negative effect on your tank and valve seals.

In this instance, however, it sounds more like a sensor issue.
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