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Old 10-12-2016, 07:18 AM   #1
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LPG Tank Gauge

First of all I would like to say thanks to all you regular contributors. While this is my first post, I bought a used 2013 EXT Lounge back in June and have benefitted tremendously from the many (endless) words of wisdom and advise I have read in this forum.

I have recently run into a problem that I would like to mention here before taking the RV to an Airstream Dealer.

My LPG tank gauge functioned normally for several months after I bought the RV but the last time I used the RV I went to test the LPG tank volume. When I did, it showed a single red light at the bottom which surprised me since I didn't think I had used that much LPG. I went and had the tank filled but it only took 5 gallons so there is obviously something wrong with the still showed empty (red light) after a complete fill-up.

Anyone else have any problems like this? Any suggestions?

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Old 10-12-2016, 08:04 AM   #2
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The LP tank gauges are notoriously unreliable, but yours sounds worse than most. The light on the interior panel are driven by a sending unit that attaches to the analog gauge on the tank. This link is what it looks like.

It's probably worth it to have dealer check it out since there are several possibilities than can cause a zero reading when you have a full tank.

- - Mike
2013 Lounge EXT on 2012 Sprinter

- - Mike
2013 Airstream Interstate Lounge EXT
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Old 10-12-2016, 08:41 AM   #3
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I appreciate the quick response.

I looked at the sending unit last night as I was checking for any LPG leaks. The plastic gauge itself was just hanging by the wires so the gauge seems to have broken free of any attachment. When I touched where the wires from the plastic gauge connected (it looked like a ceramic element) it was almost too hot to hold for very long. I just turned off the solenoid until I can get it in to get it looked at.
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Old 10-12-2016, 09:13 AM   #4
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Originally Posted by Boxster1971 View Post
The LP tank gauges are notoriously unreliable, ...

We replaced our LPG tank last year and the danged gauge still doesn't work properly despite being newly installed and newly wired. I never know what we have in the tank.

I noticed in our local RV repair place that they have external ultrasound gauges for sale right next to their cash register, suggesting that it's an item that many customers request. They were similar in design to this Truma Level Check gauge and they were not cheap. I don't know if they work. Even if they did, with an Interstate, it would require crawling under the chassis and with a horizontal rather than vertical cylinder, I'm not sure how accurate they would be.
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Old 10-12-2016, 10:24 AM   #5
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I have one of these and I'm pretty happy with it.
"Between what matters and what seems to matter, how should the world we know judge wisely?" - E.C. Bentley, Trent's Last Case
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Old 10-12-2016, 05:12 PM   #6
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Your RV needs to be level for it to work right. On an incline, mine also showed near empty, only to take 4 gallons just the same.
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Old 10-18-2016, 12:37 PM   #7
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Thanks, I will get one and try it out....

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