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General Discussion of preventative/corrective maintenance and other technical issues regarding your coach that are not covered in other Mechanic's Corner categories (ex. refrigerators, water heaters, and compressors).

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  #1  
Old 03-21-2010
Rick Davis Rick Davis is offline
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Default Tank level indicators

Waste tank indicators lights showed full, but I questioned that it was really full. Dumped, and indicators now show 3 of 5 lights. What gives?
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  #2  
Old 03-21-2010
Joatha Joatha is offline
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You have **** (literally or figuratively) on the sensors. You'll need to get the debris off the sensors in the tank. That's the problem.
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  #3  
Old 03-21-2010
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Ernest Ekberg Ernest Ekberg is offline
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The only tank level indicator that is sorta right on is the fresh water. My propane indicator always shows full, even when I'm running on fumes. The black and gray show whatever they want. I kinda gauge the gray- when it backs up in the shower- time to dump. Kinda like the black- when it--T M I--
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  #4  
Old 03-21-2010
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NH Bill NH Bill is offline
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I think a lot of us have this problem. Sometimes they read ok, but often they don't, especially the black tank.

Recently, I was with Tom Sorrentino (BIG BLUE 87 PT38) and he was having a similar problem with his windshield washer indicator. THe low level warning light on his dash was on and off and on and off giving false reading of low. The sensor for this tank appears to be set up in a way that is similar to the holding tanks. To fix it, he simply replaced the sensor screw with a longer stainless one and it worked just fine afterward.

So, I have been thinking about trying the same thing with the holding tanks. However, I'm wondering if some kind of a coated screw would work and be less likely to get fouled. Or, does it need to be bare metal to get a reading. Any thoughts on this?

NH Bill
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  #5  
Old 03-21-2010
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Ernest Ekberg Ernest Ekberg is offline
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I think that if you add a longer screw in the black tank, you may get more debris attached to it?
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  #6  
Old 03-21-2010
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Mike Hohnstein Mike Hohnstein is offline
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I screwed in them Horst sensors, buy on line, black tank lights seem to be working now.
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  #7  
Old 03-21-2010
AC7880 AC7880 is offline
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Install external tank sensors and never worry about **** on the black and grey tank sensors again.
http://www.rvgauge.com/products/model_709.shtml




Quote:
Originally Posted by Rick Davis View Post
Waste tank indicators lights showed full, but I questioned that it was really full. Dumped, and indicators now show 3 of 5 lights. What gives?
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Sold the BMC, left the forums.
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  #8  
Old 03-21-2010
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Rob Robinson Rob Robinson is offline
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Quote:
Originally Posted by Mike Hohnstein View Post
I screwed in them Horst sensors, buy on line, black tank lights seem to be working now.
Here's a link that describes the Horst system

http://www.rvprobes.com/home.html
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  #9  
Old 03-21-2010
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NH Bill NH Bill is offline
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Quote:
Originally Posted by Mike Hohnstein View Post
I screwed in them Horst sensors, buy on line, black tank lights seem to be working now.
First time I hear of these Horst sensors. Found the site with a YouTube video.

Mike, were you able to use the Birds galley indicators or did you have to do something else. Looks like the Bird's system uses a two conductor method.

http://www.rvprobes.com/home.html

NH Bill
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  #10  
Old 10-05-2017
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George George is offline
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I had the same problem with our 2001 LX waste tank. I cut an inspection hole in the top on the curb side, made a metal cover for it with a gasket. Then bought several 1/2 inch black pipe fittings and made a tank wash. I mounted it on the metal inspection cover. used 1/2 inch pipe caps as the spray ends. I used a hacksaw and cut each cap thru at an angle that pointed directly at the sensors, ran the waterline over to the street side in the water bay and I used a garden hose tee to split the incoming water so i can control the tank wash with the turn on the valve on the tee. Just tested it running only coach pump pressure water for about one minute and tank now reads correctly. I a happy man now!!!
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