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Old 12-18-2015, 10:48 AM   #1
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No LPG getting through

I have a 2015 International 27FB, which I bought new a little over a year ago now. Suddenly, I have no LPG available for anything (stove, furnace, fridge). I have a full LP tank, the Cavagna (switchover) regulator shows green. Could my regulator be defective? I'm currently parked in Oceanside CA so not subfreezing. Am I missing something? BTW - on a couple other occasions in the past few months we noticed that the stove was getting no gas for awhile, but suddenly started working normally again. At the time I just thought there was a hiccup in the system somewhere and quickly forgot about it... until now...
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Old 12-18-2015, 10:53 AM   #2
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First thought, are the valves on both tanks open fully?

Brian
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Old 12-18-2015, 10:54 AM   #3
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The newer regulators can do this, if they have sensed a possible leak in the lines. Turn off both tanks completely, turn off water heater and fridge propane options, and then turn on the active propane tank by opening its valve VERY slowly. Try lighting one burner on the stove top. Burner lights OK?
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Old 12-18-2015, 11:04 AM   #4
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The valve is open on one tank (the other tank is empty). I'll try closing things off as suggested and see what happens. (Although I did try a similar process earlier... may not have opened the tank valve slowly though.) Thanks!
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Old 12-18-2015, 11:40 AM   #5
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Ok, I went through the process that OTRA15 suggested and the stove burner lit with a low flame for about 5 seconds, then went out. Tried the process again (along with unhooking the pigtail connector) and the burner won't light at all.

One thing that I didn't mention earlier was that about a week ago I noticed a pinhole leak on one of my pigtail hoses. I therefore shut that pigtail side off and have only been using the LP tank on the other side since then. (I have not had time to replace the bad pigtail yet.) Everything was working fine on the good side until yesterday. Interestingly, even when I had the pinhole leak in the pigtail, the regulator was still allowing gas to get through.
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Old 12-18-2015, 11:55 AM   #6
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regulator or tank switch probably. Or an empty bottle. If your bottles are going down faster than normal you may have a leak
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Old 12-18-2015, 11:59 AM   #7
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1) leak large enough to trip the regulator or POL connector on the pigtail into bypass mode
2) bad regulator/changeover valve
3) bad pigtail (POL going into bypass incorrectly)

You need to start substituting some parts to find the problem (you need a known good pigtail and regulator)

I guess the OPD valve in the cylinder could be bad as well, although I'm not sure exactly what the failure mode is there
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Old 12-18-2015, 12:11 PM   #8
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Thanks for the feedback. I bought 2 new pigtail connectors. Will test them out later today.
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Old 12-18-2015, 12:29 PM   #9
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You may be about to find out that Airstream uses 1/4" NPT connections between the regulator and pigtail. Industry standard (especially in the retail chain for parts) is 1/4" inverse flare. You may need to add or remove adapters.


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Old 12-18-2015, 02:58 PM   #10
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Quote:
Originally Posted by RichardW View Post
Thanks for the feedback. I bought 2 new pigtail connectors. Will test them out later today.
Quote:
Originally Posted by khollister View Post
You may be about to find out that Airstream uses 1/4" NPT connections between the regulator and pigtail. Industry standard (especially in the retail chain for parts) is 1/4" inverse flare. You may need to add or remove adapters.
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New correct pigtails should reduce the variables at least, and hopefully prove the solution.

Good luck!

Peter
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Old 12-18-2015, 04:05 PM   #11
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It may take more than one time turning the gas on.
The leak protection shuts down the flow to nothing or almost nothing. So if the gas lines aren't already pressurized, when you open the tank valve, it thinks there is a leak it will shut itself down.
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Old 12-18-2015, 04:39 PM   #12
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I sometimes have to move the manual change over valve to the new tank side and also open the valve very slowly to get gas to flow. There seems to be some kind of shutoff valve inside the regulator that this re-sets after running both tanks empty. I didn't have to do this on my old regulator. I haven't gotten more than a year or two out of inlet hoses before they harden up and leak around the crimp fittings, I'm hoping to find some that last better someday. I'm almost ready to go back to copper inlet lines due to these leaks. I hope the new lines fix the problem. Leland
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Old 12-18-2015, 05:33 PM   #13
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Ok. As Keith eluded to, I wasn't able connect my new pigtails directly to the old regulator. I swung by the Airstream dealer in San Diego and picked up a new regulator. The tech there also thought the problem was in the regulator as well. I installed the new regulator and pigtails and everything is lovely now!

This should have been a warranty repair as my AS is only about a year old. The dealer here was booked until January, so no way I was going to wait for that. They were very helpful in any case when I explained the situation and bought a new regulator. It was relatively easy to fix... just a bit aggravating that it malfunctioned already.
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Old 12-18-2015, 05:36 PM   #14
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Thanks to all for the advice!
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