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Old 12-17-2013, 06:18 PM   #1
2012 Georgetown 378
 
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Black tank Blues!

Hello fellow Georgetownians, need some advice on my 2012 378. Ever since delivery the black tank sensor has read 1/3rd full when empty, sometimes 2/3rds but if I continue to hold the sensor button on it drops back to 1/3rd. Had it into the dealer a few times and so far they have changed out the panel, rewired the sensors at the tank, completely flushed out the tank and who knows what else. Anyone else with this problem and how was it resolved?

thanks all....
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Old 12-17-2013, 06:50 PM   #2
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raycyn778

The dumb lights are just probes and that's it. You must have some slime or buildup after the tank was left for awhile in the past.
I have heard some use Calgone Water softener powder and fill up the tank when you are heading out for a long drive tot he campground. Flush a few time.


I have also heard others fill tank with water and add RidX and flush the tank a few times..

Changing sensors and you still may have the same problem. The slime on the tank walls and sensors just need to get cleaned off.


You could also try some dish washing soap that removes grease and add it with lots of water to see if that helps.

Flush, Flush, Flush and hope for the best.
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Old 12-17-2013, 07:16 PM   #3
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Quote:
Originally Posted by raycyn778 View Post
Hello fellow Georgetownians, need some advice on my 2012 378. Ever since delivery the black tank sensor has read 1/3rd full when empty, sometimes 2/3rds but if I continue to hold the sensor button on it drops back to 1/3rd. Had it into the dealer a few times and so far they have changed out the panel, rewired the sensors at the tank, completely flushed out the tank and who knows what else. Anyone else with this problem and how was it resolved?

thanks all....
Another tried and true method is the cleaning lance sold by Camco and Walmart. Insert through head, mark lance at water inlet and direct the jet towards the probes. On Georgetown about mid width of tank top to bottom opposite the head. Train water on probe location and check gauge occasionally. It will soon clear but not for long. I do mine every few weeks to keep cleaned off. Iggy is correct its not really things hanging on the probes, its scum build up on the wall making a circuit between probes.
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Old 12-17-2013, 07:28 PM   #4
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Quote:
Originally Posted by raycyn778 View Post
Hello fellow Georgetownians, need some advice on my 2012 378. Ever since delivery the black tank sensor has read 1/3rd full when empty, sometimes 2/3rds but if I continue to hold the sensor button on it drops back to 1/3rd. Had it into the dealer a few times and so far they have changed out the panel, rewired the sensors at the tank, completely flushed out the tank and who knows what else. Anyone else with this problem and how was it resolved?

thanks all....
Or do what most everyone does and that is to ignore the lights until they read full. Both our trailers that came with lights showed 1/3 when brand new and had never had anything in them.
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Old 12-17-2013, 09:16 PM   #5
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Same problem here. The black tank idiot lights are useless. There is an expensive alternative technology that measures the tank density to determine the exact water level. They can be added as an aftermarket item to a tank. Here's an example:

RV Holding Tank Monitor System | ModMyRV

I use a simple and reliable method to determine if the black tank is getting full. When the toilet "burps", it's time to empty the tank...
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Old 12-18-2013, 12:11 AM   #6
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Same problem here. The black tank idiot lights are useless. There is an expensive alternative technology that measures the tank density to determine the exact water level. They can be added as an aftermarket item to a tank. Here's an example:

RV Holding Tank Monitor System | ModMyRV

I use a simple and reliable method to determine if the black tank is getting full. When the toilet "burps", it's time to empty the tank...
"When the toilet "burps", it's time to empty the tank"
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Old 12-18-2013, 12:14 AM   #7
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Same problem here. The black tank idiot lights are useless. There is an expensive alternative technology that measures the tank density to determine the exact water level. They can be added as an aftermarket item to a tank. Here's an example:

RV Holding Tank Monitor System | ModMyRV

I use a simple and reliable method to determine if the black tank is getting full. When the toilet "burps", it's time to empty the tank...

Here is another alternatives to your probes.
These suppose to work even with toilet paper on it.
HORST BL232 - Horst Probes, Black Water, 4/pk BL232 - RV Plus

But I like the method.... Wait until it burbs........

Also read this thread on FR Forums with pictures from Lou.
Horst tank Probe Installation
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Old 12-18-2013, 12:49 AM   #8
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On our last trip, I dumped and rinsed well at the campground, re-filled the tank to about 2/3 full ( I used all the hot water from the HW tank ) and added ( a lot ) of liquid laundry detergent, maybe 6-8 cups or more. During the drive home I made sure to slosh it around and pump the brakes a bit at lower speeds and while approaching stop lights. A hundred miles later, I used the closest rest stop dump station to empty and rinse again. Presto ! Working sensors.

.... But I know it's only temporary.
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Old 12-18-2013, 06:20 AM   #9
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Or do what most everyone does and that is to ignore the lights until they read full. Both our trailers that came with lights showed 1/3 when brand new and had never had anything in them.

X2 Very common issue with most RVs black tanks..... I have always ignored the lights & have a real good idea over the years how long we can go before filling the tank.

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Old 12-18-2013, 08:20 AM   #10
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After all the comments about sensors and inaccuracy within them I just have to comment and say that after you've used your unit awhile you'll figure out your tanks capacities and wont even need to use your sensors for reference.
If your a weekender you'll commonly not fill the tanks.
If your a full timer most likely you'll have full hook ups and be able to dump every 3-4 days depending on usage.

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