[Georgeb]

good morning from Galveston 

Our coach 385 is a 1995 model
Our first night in town i forgot to turn on AC compressor air was still holding around 70 Lbs
The next morning.....NOW

We have a new air leak. The AC compressor is running every 10/15 min
I have soaped everything (I hope) and found nothing.
The coach is setting level. If I turn off the compressor air drops to 50 lbs and stays there
For hours
Any ideas????

[rheavn]

George,
You know you have air leak(s), the question is where.  Remember ten small leaks equals one big air leak.  I tried the spraying soapy water around & never found any.  Asking for guesses or using the shotgun method likely will not find your leak(s).

The best way to find air leaks is to have an organized approach that focuses on components and fittings. Then these components & fittings need to be isolated and tested, using the right tools.  These components and fittings can be inside the coach, available through the exterior compartments and under the coach.  Also suspect your air tanks--mine has eleven.

Read these threads.  These inexpensive tools are needed to locate and fix your air leaks.

http://newellgurus.com/showthread.php?tid=2705

http://newellgurus.com/showthread.php?tid=2674

http://newellgurus.com/showthread.php?tid=3731

Good luck & let us know what you find.......................................

[77newell]

What are your brake pressure gauges showing? The reason I ask is that when the pressure in the system drops below some set pressure, usually 60psi or so, a PPV (pressure protection valve) closes and separates the brake systems from everything else. The "supply" pressure gauge on the dash tells you the pressure in the "everything else" category and the brake gauge with 2 needles tells you the pressure in the two brake tanks. If something in your brake system is leaking, as indicated by a drop in one or both brake needles, then the pressure in the "supply" will stop following the brake pressure down once the PPV closes.

[Georgeb]

I found the leak
It’s leaking back (out of) through the small DC compressor

Now I’m wondering why?
I’ll track it down

[Georgeb]

There is a small check valve inline from the DC compressor 
It’s leaking
Leaking More since I broke it ....LOL

Ah well....guess I’ll make a trip to parts house