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Old 07-29-2021, 07:07 PM   #1
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Dash A/C Schematic Help Freon Leak 2015 DS

Does anyone know where I can get a schematic or drawing of the dash AC system including how the freon lines are run from the front to back? Newmar sent me to Newgal which only has operating instructions. I have a 2015 DS and the system does not hold freon but nobody can find a leak.
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Old 07-29-2021, 07:26 PM   #2
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How are they searching for a leak? They should have added a bottle of leak finder and then shown a black light along those big hoses while under the RV on a creeper. That would have shown them as they followed those hoses, that the big evaporator under that grill way in the back on the drivers side has a large drier there and those can leak along with any hose or hose connection between the evap, compressor, drier, and condenser. There isn't any trick to finding a leak, just have to follow the hoses. And in an RV, I'm sure many techs really don't want to do all that work trying to find it.

I have a slow leak in my dash system and what I did was install EnviroSafe instead of freon. Larger molecules so doesn't leak as easily. Also installed a can of stop leak for AC. So far so good. Seems to be holding now.
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Old 07-30-2021, 05:57 AM   #3
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Quote:
Originally Posted by Desiday View Post
Does anyone know where I can get a schematic or drawing of the dash AC system including how the freon lines are run from the front to back? Newmar sent me to Newgal which only has operating instructions. I have a 2015 DS and the system does not hold freon but nobody can find a leak.
The Freon hoses run along the frame rails in the basement , off the compressor there is a 84" line that runs from the compressor to the evaporator on the side radiator, out 0f the evaporator routed over the axle to the frame rail, and into the basement, where the rails are sealed.
runs up to the front to the dryer and the Evans Tempcon AC unit, out of the unit and back along the frame rails through the basement to the AC compressor. I believe they are in a black channel box on the inside of the drivers side frame rail.
Hope this helps
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Old 07-30-2021, 07:10 AM   #4
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When the AC folks worked on my coach they disconnected the system at various points and installed caps or plugs to close up the portion they were going to leak test. The leak test was actually done by pulling a vacuum and verifying that the portion of the system under test would hold the vacuum. Once they found the part(s) that would not hold the vacuum they then continued to isolate the various parts until they found the leak. Perhaps this method will help if it's different than what you shop is doing.
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Old 07-30-2021, 12:27 PM   #5
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Not long after taking delivery I noticed evidence of leakage at both hose fittings at the evaporator behind the radiator grill. Tightened the fittings and no issues since
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