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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 01-27-2009
GPSGary GPSGary is offline
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Default Holding tank indicators

Does anyone know the technology behind the indicators on the kitchen panel that show the levels of the pure, grey, black water and propane tanks.

I'm referring to the indicators that have leds running left to right under the "E" and "F" positions.

I get odd readings from the three water tanks where the number of leds lit will vary a lot from two sequential pressings of the "read" button and I've gone from "F" to "E" in about one gallon on the fresh water and the reverse on the grey and black water.

How can I access and verify the sensors?
Is there a reasonable hi-tech retrofit?

Regards,
GPSGary
1984FC35SB
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  #2  
Old 01-27-2009
jwasnewski jwasnewski is offline
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If yours are like mine the senders are stainless screws that protrude into the tank. I do not know exactly how they work but presumably, don't like to use that word, when water hits the screw it makes a ground an turns a light on.
There are wireless units available now.
Mine work fine as long as no paper or other crud accumulates on the screws.
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  #3  
Old 01-27-2009
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dmatz dmatz is offline
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Default Tank Diods

The tanks have diods by the sensors.I had a simular issue and the factory replaced them. After that it worked good. They had them in stock as well.
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  #4  
Old 01-28-2009
mynavion mynavion is offline
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Wink Black Water Level Indicator upgrade kit

The best retro fit for the black water level indicators in a side bath Forward Control is a battery powered unit. It comes in various sizes and the number of batteries and size of batteries is usually determined by the size and configuration of the new fluid level indicator. Its use is simple: open the toilet lid, flip or push the on switch on the indicator (depends on brand), line the indicator up with the short pipe from the toilet to the holding tank and take a look. Just be aware depending on the size and type these level indicators may not indicate as well after much usage but new batteries will fix that. This upgrade is much easier that trying to constantly fiddle with the built in unit and its sensors.
As far as grey water monitoring there is also an aftermarket indicator there too, although most folks don't care for it as much. When the water in the shower gets about "half a toe" deep (your wife will let you know) then its time to empty the grey water.
For the propane, seriously I take a flash light outside( a black water level indicator will work) and take a look at the built in indicator on the propane tank. Even though my monitor seems to be pretty accurate I like to take a direct look occasionally. I don't have to do this often but instead more as a comfort factor that I will know for sure how much propane I have.

John


Quote:
Originally Posted by GPSGary View Post
Does anyone know the technology behind the indicators on the kitchen panel that show the levels of the pure, grey, black water and propane tanks.

I'm referring to the indicators that have leds running left to right under the "E" and "F" positions.

I get odd readings from the three water tanks where the number of leds lit will vary a lot from two sequential pressings of the "read" button and I've gone from "F" to "E" in about one gallon on the fresh water and the reverse on the grey and black water.

How can I access and verify the sensors?
Is there a reasonable hi-tech retrofit?

Regards,
GPSGary
1984FC35SB
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1980 33FC
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Stockbridge, GA
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  #5  
Old 01-28-2009
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MRPutz MRPutz is offline
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Hey Gary,
Yes, there are screws that protrude into the tank and the liquid inside makes connections when the fluid level reaches them. The screws can become dirty with "debree" and give false signals. There are chemicals designed to keep these clean and the high pressure tank cleaners (wands) also help.

As far as replacements... there are several that I know of. I just replaced my fresh water tank and really don't want to drill 5 holes in it for the screw system. One system can replace your monitors with a newer style designed to give more accurate readings. The advantage here is that you can keep your current monitor panel.

http://www.pplmotorhomes.com/parts/r...ank-probes.htm

Here's another option I was looking at. Since these tanks are not metal they have a system that has two metalic strips that have a double sided tape that merely tapes to the tank. It can tell water level by using a signal they pass between the two tapes. Advanage is there are no holes! And it's pretty accurate as you can adjust the signal. They also have a solution for metal tanks but it requires another hole for their large sensor

http://www.modmyrv.com/2009/01/12/rv...onitor-system/
http://www.ferriellosales.com/wst_page5.html

Another style I've heard of is another sensor that can actually measure the air pressure of the tank. But you have to pressurize your tank with air for this system to work. Drawback here is that it would require another hole unless they can use existing supply lines?

http://www.stearnsonline.com/marinetank/index.htm

So we do have other options and some are compatible with our current systems. So read these very carefully and look at the PDF documents on installation to see which way you'd like to go.

Hope that helps...
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  #6  
Old 01-28-2009
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Bill Pape Bill Pape is offline
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Michael Good info,

Does anyone have experience with these systems, that could make a recommendation, We have tried all the chemicals and several other remedies offered by the forum, Our fresh water and propane indicators are very accurate, but the grey and black tank indicators are very unreliable.
Patty really hates the bubble up in the shower method.
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  #7  
Old 01-28-2009
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MRPutz MRPutz is offline
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Hey Bill.. Just another "idea". When I was converting a Bluebird I sized my holding tanks in such a way that in "normal" usage I could completely use up the fresh and not over flow the holding tanks. In this scenario I merely monitored the Fresh water and that would indicate the condition of the other two. I did that just for this reason, fresh water monitoring systems are usually more accurate without all the debree.

Just another way to skin a cat.
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'90 GL1500 Goldwing | '67 VW Rail | '82 CJ5 Jeep
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  #8  
Old 12-28-2009
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Bill Pape Bill Pape is offline
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Does anyone have experience with replacing the sensor probes on the holding tanks.

http://www.horstmiracleprobes.com/

Video http://www.horstmiracleprobes.com/buy.php
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  #9  
Old 12-28-2009
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Rob Robinson Rob Robinson is offline
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Quote:
Originally Posted by Bill Pape View Post
Does anyone have experience with replacing the sensor probes on the holding tanks.

http://www.horstmiracleprobes.com/

Video http://www.horstmiracleprobes.com/buy.php
Bill in 2007 Don Bradner posted about his repair. A search should find his post. Also there is some new things out now that have shields on them to keep crud from fouling the sensors. I'll look to see if I have the url
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  #10  
Old 12-28-2009
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I use the fresh water gauge idea at times as well
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