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Old 01-21-2022, 11:12 AM   #1
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Water in fuel display

I have two green indicator lights under the fuel gauge that indicate water in the fuel. I drained some fuel out of the separator into a clear jar. Only diesel, no presence of water.
What am I missing?

2013 open road 34qfa, Cummins diesel
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Old 01-21-2022, 02:07 PM   #2
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Are you sure that the lights are for water in fuel and not DEF quantity? The symbol for water in fuel is normally a yellow fuel pump with three drops on one side.
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Old 01-21-2022, 02:35 PM   #3
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Exactly . . . Water indicator is yellow and the green indicators is DEF level
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Old 01-21-2022, 05:03 PM   #4
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Excellent…did not think of the DEF tank….I have about 1/2 tank
Thank you!
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Old 01-21-2022, 06:48 PM   #5
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Excellent…did not think of the DEF tank….I have about 1/2 tank

Thank you!


Yes, I believe each light indicates 1/4
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Old 01-21-2022, 08:30 PM   #6
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Is the 34qfa an Allegro Red or an Allegro Open Road. I didn't think the "Open Road" had a diesel engine. I have a 2018 Open Road with a gas engine, so did some of the earlier Open Road models have a diesel engine, and is it in the rear or front? Just a little confused.
Thanks,
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Old 01-21-2022, 09:35 PM   #7
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They changed the designations around 2017-2018 by dropping the Open Road designation on the REDs. Our 2015 was an Allegro Open Road RED branded on the logos.
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Old 01-22-2022, 08:37 AM   #8
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Thanks for clearing that up Lt Dan. I just always think of "Open Road" as Tiffin's gas model class A, but now know to be careful in my assumptions.
I guess RV manufacturers like to keep their customers confused. Tiffin uses the "Allegro" name in several different models also, which is sometimes confusing.
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Old 01-25-2022, 11:25 AM   #9
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I have a similar problem with my Cummins engine. It has happened several times, always when raining or in high humidity. Never found the cause.
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Old 01-26-2022, 09:25 AM   #10
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I have a similar problem with my Cummins engine. It has happened several times, always when raining or in high humidity. Never found the cause.
A bad connector at the fuel filter.
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