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Old 05-18-2013, 07:19 PM   #1
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Control Panel Accuracy

I just purchased a used motorhome a few weeks ago and have been slowly fixing things on it. I just noticed today that the control panel is showing Black Water Tank 2/3 full, Gray Water Empty, Fresh Water Empty, and LP Full.

The dealer told me when I picked it up (I bought on eBay) that the LP was empty. Also, I'm shocked that a dealer would sell a unit with Black Water nearly full.

Do you think the control panel is not working properly?

If not, am I in trouble when it comes to flushing the black water tank? Who knows when this rig was last used. It could be petrified in there for all I know

Any suggestions on how to figure out the situation?

Thanks!
Jane
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Old 05-18-2013, 07:25 PM   #2
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Hi, Jane. Sadly, many times those gauges are less than accurate. If your black tank needs flushing, I'd recommend running kitchen faucets, shower, etc. until there is water in the gray tank for sufficient "second flush" after you dump the black.
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Old 05-18-2013, 07:29 PM   #3
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Oh, I forgot to add this pleasant tidbit. If the black tank has developed the dreaded "pyramid" of solids, dumping ice cubes into the tank and driving around for a while will help loosen things up.
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Old 05-18-2013, 07:32 PM   #4
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Oh, I forgot to add this pleasant tidbit. If the black tank has developed the dreaded "pyramid" of solids, dumping ice cubes into the tank and driving around for a while will help loosen things up.
Triple EWWWW
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Old 05-18-2013, 07:55 PM   #5
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Triple EWWWW
I KNOW, right?? (Get some gloves and some Lysol spray for your wet bay.)
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Old 05-18-2013, 09:05 PM   #6
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Often the toilet is directly over the black tank. If you open the flush valve (water pump off) and shine a light down you might be able to see the level. The sensors in the tanks get gunked up (scientific term) and give inaccurate readings. A thorough cleaning of the tanks can help, as can adjusting the potentiometers on the control panel. Here's a link to the Geo Method of tank cleaning. It works, but finding the Calgon Water Softener is hard.

https://sites.google.com/site/cbruni/

After cleaning the tanks, then you can follow the directions on this link to see if you have the 'pots' on your control panel. (it would be a good idea to add age and model of your RV to your signature)

If you are close to your dealer and find your tanks are full, call and ask your salesman to see if they can 'teach' you how to dump the tanks-- They almost always have dump facilities, but don't advertise it so they don't get buried in sewage. (Tell them you saw the movie 'RV' and are afraid to try it!)
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Old 05-18-2013, 11:00 PM   #7
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If all else fails you can install this system.
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Old 05-19-2013, 06:51 AM   #8
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Often the toilet is directly over the black tank. If you open the flush valve (water pump off) and shine a light down you might be able to see the level. The sensors in the tanks get gunked up (scientific term) and give inaccurate readings. A thorough cleaning of the tanks can help, as can adjusting the potentiometers on the control panel. Here's a link to the Geo Method of tank cleaning. It works, but finding the Calgon Water Softener is hard.

https://sites.google.com/site/cbruni/

After cleaning the tanks, then you can follow the directions on this link to see if you have the 'pots' on your control panel. (it would be a good idea to add age and model of your RV to your signature)

If you are close to your dealer and find your tanks are full, call and ask your salesman to see if they can 'teach' you how to dump the tanks-- They almost always have dump facilities, but don't advertise it so they don't get buried in sewage. (Tell them you saw the movie 'RV' and are afraid to try it!)
Thanks for all of the info and links. Unfortunately, I'm not close to the dealer, but I'm guessing I could probably find something on YouTube to demonstrate the process. The movie "RV" sounds interesting. I wonder if it is on Netflix

Hey, I never thought I'd have a situation where I could use the popcorn Smilie!
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Old 05-19-2013, 06:53 AM   #9
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Originally Posted by 007";1572631]If all else fails you can [URL="http://www.rvupgradestore.com/RV-Tank-Monitor-System-s/164.htm
install this system[/URL].
Thanks! I see I have several options to consider. Appreciate the tip.
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Old 05-19-2013, 03:54 PM   #10
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Originally Posted by BFlinn181 View Post

If you are close to your dealer and find your tanks are full, call and ask your salesman to see if they can 'teach' you how to dump the tanks-- They almost always have dump facilities, but don't advertise it so they don't get buried in sewage. (Tell them you saw the movie 'RV' and are afraid to try it!)
O..M...G - I am watching the movie RV right now. IF that happens to me, I will throw up. But I have been doing my homework, so I don't think I will have any problems. But, ew...EW!
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Old 05-19-2013, 04:28 PM   #11
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Janie after reading your link this thread information will explain your coach wiring systems.

Any time you have shore power leave the line connected so the battery converter will charge your battery system and keep them fully charged. Also leave you battery disconnect switch always on when using your coach and using Gen or shore power line.

Your Gen needs the house batteries to start. With fully charge house batteries your battery boost button will start your engine if you chassis, engine battery, is dead.

Never plug shore line into a outlet other than a 30 or 50 amp outlet like in a campground pedestal, some thing not standard can blow all your electronics in your coach.
This link also has useful info.
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