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Old 03-25-2012, 08:48 PM   #15
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My sensor reads correctly for the grey, but even empty my black water always reads 1/3 full. I have flushed it and flushed it to the point of clear water and it never reads empty. Is it a big job to replace the sensor? the 2/3 and full work fine but it always glows read for the 1/3 ????
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Old 03-26-2012, 04:42 AM   #16
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My sensor reads correctly for the grey, but even empty my black water always reads 1/3 full. I have flushed it and flushed it to the point of clear water and it never reads empty. Is it a big job to replace the sensor? the 2/3 and full work fine but it always glows read for the 1/3 ????
Install the SeeLevel Tank Level System. You'll never regret it. 100% accurate ALL of the time. Easy to install if you follow the directions correctly. Available at RVupgrades.com

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Old 03-26-2012, 07:05 AM   #17
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Originally Posted by first5thwheel
My sensor reads correctly for the grey, but even empty my black water always reads 1/3 full. I have flushed it and flushed it to the point of clear water and it never reads empty. Is it a big job to replace the sensor? the 2/3 and full work fine but it always glows read for the 1/3 ????
I've never replaced a sensor but, most would depend on how easy your access was to it. On my old rig, I had easy access to the tank and sensors, so I'll guess 30 mins.

My present rig, the tanks are enclosed in the basement with only small access panels. So I would check your access first.

It's still possible your sensor it good. If you have the time and patiences, fill it with clear warm water and a lot of strong detergent. Wait for a few days and flush good. This won't really cost anything and then you'll know for sure.
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Old 03-26-2012, 05:40 PM   #18
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Thanks for the link. If I cannot resurect the dead sensor if it is in fact a gonner this is something to consider.
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Old 03-26-2012, 05:41 PM   #19
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I've never replaced a sensor but, most would depend on how easy your access was to it. On my old rig, I had easy access to the tank and sensors, so I'll guess 30 mins.

My present rig, the tanks are enclosed in the basement with only small access panels. So I would check your access first.

It's still possible your sensor it good. If you have the time and patiences, fill it with clear warm water and a lot of strong detergent. Wait for a few days and flush good. This won't really cost anything and then you'll know for sure.

I will keep trying, just maybe I can get it to register accurately with strong detergent and repeated flushes.
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Old 03-26-2012, 06:04 PM   #20
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Many (most?) of us who are in our rvs a lot have learned that the standard sensors on black and grey tanks are notoriously unreliable and, unless you are willing to install the See Level or other sensors they will never be right. We typically clean our sensors with cleaner in the tanks when we travel. The sloshing on the road does a good job cleaning them so they work, but typically the sensors do not work after a week or two parked. We have learned to rely on sounds (toilet burps) and experience to know when tanks need dumped. Good luck.
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Old 03-26-2012, 06:34 PM   #21
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I will keep trying, just maybe I can get it to register accurately with strong detergent and repeated flushes.
Instead of using more and more chemicals, perhaps you could try some "Extreme clean" from THESE people... I just used it in our new-to-us fifth wheel and all my sensors work perfectly!


I also use their holding tank treatment in both the gray and black tanks... NO more odor!
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