RV Trip Planning Discussions

Go Back   iRV2 Forums > iRV2.com COMMUNITY FORUMS > iRV2.com General Discussion
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 07-01-2020, 02:19 PM   #1
Senior Member
 
Join Date: Feb 2020
Posts: 173
Grey Tank Sensor Issue.

Doing google research shows most sensor issues will show the level is more full even if the tank is empty.

Well, I have the opposite issue. The last 2 times our grey tank showed only 2/3 full, but we were getting water backed up in the shower. So its obviously very full.

I found all the grey tank sensors, all the wires look good.

Not sure where to look next.

Any suggestions on what to check next?

Thanks!
__________________

__________________
2020 Georgetown GT7 36D7
GT7 Jim is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 07-01-2020, 02:21 PM   #2
Senior Member
 
Join Date: Feb 2020
Posts: 173
Oh, this is a new unit by the way.

This is our 3rd trip.
__________________

__________________
2020 Georgetown GT7 36D7
GT7 Jim is offline   Reply With Quote
Old 07-01-2020, 02:29 PM   #3
Senior Member
 
AlanTerry's Avatar
 
Fleetwood Owners Club
Join Date: Dec 2010
Location: Cincinnati, Ohio
Posts: 281
Sounds like a warranty issue. Write it up and take it in.
__________________
Alan & Terry 2016 Bounder 34T
Blue Ox Alpha Tow Bar, RVi brake 2system
2015 Jeep Trail Hawk (Toad)
AlanTerry is offline   Reply With Quote
Old 07-01-2020, 02:36 PM   #4
Senior Member
 
Join Date: Feb 2020
Posts: 173
Quote:
Originally Posted by AlanTerry View Post
Sounds like a warranty issue. Write it up and take it in.
I like to see if I can figure it out myself first.

If not, then I'll take to dealer.

Now I'm trying to figure what type/brand of sensors they are so I can do some better google-ing.

Its a small black box with 4 purple wires going to the sensors in the tank.
__________________
2020 Georgetown GT7 36D7
GT7 Jim is offline   Reply With Quote
Old 07-01-2020, 07:29 PM   #5
Senior Member
 
keymastr's Avatar
 
Outdoors RV Owners Club
Join Date: Oct 2014
Posts: 3,272
Check continuity of each wire. Most likely a bad crimp connection. Wiring is pretty amateur in most brands and often wires get strained or screws pierce them, or the connector just was not installed correctly.
__________________
2020 F28 RKS Titanium
2017 Creekside 23 RBS
2016 F250 Super Crew XLT
keymastr is offline   Reply With Quote
Old 07-02-2020, 08:48 AM   #6
Senior Member
 
Join Date: Nov 2018
Location: Beaver Dam, Wisconsin
Posts: 1,308
There are many sensor systems. The one that is common has conductor exposed inside the tank. The probes are mounted at different heights and signal when water contacts the probe and conducts to ground.


The full light may not be connected to the full probe.
The probes may not be connected to the correct lights on the panel.
There may be venting and/or plumbing faults in the gray tank.
There may be more than one gray tank and the indicator is for another tank.


I wish you good luck and happy trails ahead.
__________________
Paul Bristol
Kodiak Cub 176RD
Nissan Pathfinder 2015
Persistent is offline   Reply With Quote
Old 07-02-2020, 09:41 AM   #7
Senior Member/RVM #90
 
MSHappyCampers's Avatar
 
Monaco Owners Club
Join Date: Nov 2002
Location: Columbus, MS
Posts: 42,131
The tank sensor control is our coach has individual adjustments for each tank.
__________________
Joe & Annette
Sometimes I sits and thinks, sometimes I just sits.....
2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
MSHappyCampers is online now   Reply With Quote
Old 07-02-2020, 02:38 PM   #8
Senior Member
 
Join Date: Feb 2020
Posts: 173
Quote:
Originally Posted by Persistent View Post
There are many sensor systems. The one that is common has conductor exposed inside the tank. The probes are mounted at different heights and signal when water contacts the probe and conducts to ground.


The full light may not be connected to the full probe.
The probes may not be connected to the correct lights on the panel.
There may be venting and/or plumbing faults in the gray tank.
There may be more than one gray tank and the indicator is for another tank.


I wish you good luck and happy trails ahead.
Thanks.

I have 1 grey tank and it did work properly for 1.5 trips.

So it was installed correctly, then stopped working properly.
__________________
2020 Georgetown GT7 36D7
GT7 Jim is offline   Reply With Quote
Old 07-02-2020, 04:10 PM   #9
Senior Member
 
Join Date: May 2017
Posts: 453
Quote:
Originally Posted by MSHappyCampers View Post
The tank sensor control is our coach has individual adjustments for each tank.
Yes I had an Evergreen trailer that needed calibration. Did it myself on the back of the panel
Ted Lambert is offline   Reply With Quote
Old 07-02-2020, 09:21 PM   #10
Senior Member
 
egwilly's Avatar
 
Outdoors RV Owners Club
Join Date: Jul 2012
Location: So Calif
Posts: 2,551
The best way to check the probes is to use a jumper wire and cause each one on the tank to see ground. Then look at the panel to be sure they are wired correctly and in proper function.

If you ground say the lowest probe and you get nothing, then a wire is off or disconnected. These are very small wires they use on these.

I had to trouble shoot ours about 6 months in from new and found a crappy wiring job and loose crimps. Like you, I am not willing to goto a dealer and wait weeks for a repair I can do myself.

Best wishes!
__________________
Outdoors RV Glacier Peak 26RLS Fifth Wheel
Ford F350 Superduty 6.7 Powerstroke
Jeep Wrangler for dirt
egwilly is offline   Reply With Quote
Old 07-03-2020, 01:57 AM   #11
Senior Member
 
danhannah's Avatar
 
Winnebago Owners Club
Join Date: Nov 2014
Location: Washington State
Posts: 475
I had a similar issue - and it was a tiny component on the circuit board of the display panel. You likely have surface-mounted sensors, since it is a new rig, so clogging is not usually an issue.

It seems like only the "full" light is malfunctioning. That's an important one! Each light has its own component on the board, and that might explain why the "full" light is not working. If you ground the top sensor, like egwilly suggests, and the "full" light does not come on, look at a new circuit board...
__________________
_______________________
2014 Itasca 27n
danhannah is offline   Reply With Quote
Old 07-03-2020, 03:56 AM   #12
Senior Member
 
Join Date: May 2017
Location: Metamora, MI
Posts: 3,913
Without knowing what type of system, there is no diagnosis suggestions that make sense.

The two prevalent systems are sensors IN the tank that monitor by sensing what the water level is by conductivity. These are typically in older RVs.
The second sensor type has "foil" stuck onto the OUTSIDE of the tank that senses with capacitance the water level.

The second type there are multiple different brands that report back the level electronically to the control unit / display.

What brand is on the display?

Have you looked in your owner's kit for what type of system is installed?
Have you called the RV dealer / manufacturer for which type?
__________________
2002 Newmar Mountain Aire Limited 4370 w/ Spartan K2 and Cummins 500hp
ASE Master Certified (a long.....time ago...)
Dav L is offline   Reply With Quote
Old 07-03-2020, 07:09 AM   #13
Senior Member
 
Join Date: Feb 2020
Posts: 173
Quote:
Originally Posted by egwilly View Post
The best way to check the probes is to use a jumper wire and cause each one on the tank to see ground. Then look at the panel to be sure they are wired correctly and in proper function.

If you ground say the lowest probe and you get nothing, then a wire is off or disconnected. These are very small wires they use on these.

I had to trouble shoot ours about 6 months in from new and found a crappy wiring job and loose crimps. Like you, I am not willing to goto a dealer and wait weeks for a repair I can do myself.

Best wishes!
Thanks!
__________________

__________________
2020 Georgetown GT7 36D7
GT7 Jim is offline   Reply With Quote
Reply

Tags
grey tank, tank



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Grey tank sensor callie57702 Winnebago Industries Owner's Forum 10 03-22-2015 08:18 AM
Grey tank level sensor JVR Newmar Owner's Forum 3 03-03-2014 02:22 PM
Grey tank sensor countrypair Class A Motorhome Discussions 2 03-30-2013 02:17 PM
Grey Tank Sensor Reading Incorrect (1/4 full) tpelzek New Horizons Owners Forum and NHOG 7 12-30-2011 05:28 PM
Grey tank sensor. Perry White Newmar Owner's Forum 34 09-27-2011 10:36 PM

» Featured Campgrounds

Reviews provided by


All times are GMT -6. The time now is 11:11 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
×