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Topic: Little Compressor Issue - ??????? (Read 427 times) previous topic - next topic

Little Compressor Issue - ???????

Having a strange issue with the little compressor that's driving me crazy.
Everything has been working fine, and then all of a sudden when parked, the compressor would start running, then cut off, run a second, then cut off, run a second then cut off , and continue to do this 4 or 5 times then would shut off.
Then, after about a couple of minutes or so, it would run about 30 seconds and then do the on/off thing again. It just continuously does this.
    A.  I can't figure out why the compressor is turning on to begin with. The system has full pressure (95 to 100 psi), so why is it even turning on to begin with?
    B.  I have tried bypassing everything I can think of, and still get the same issue.
    C.  There doesn't seem to be any leaks anywhere, and all the solenoids seem to be opening and closing properly.

I have replaced the Pressure Switch Box and the Essex Relay.  All electrical connections clean and tight.
Another strange thing, I would drain off pressure from the system to see if the compressor would kick on, and for a few cycles it would only go up to 65psi and the compressor would just keep running as if the Pressure Switch was not working.  I though maybe the compressor wasn't putting out enough pressure and I even replaced the compressor with a new one.

This one really has me stumped.

Mark & Bev
2001 U295 36' Slide
Cummins ISC 8.3 350HP
Build #5802
Jeep Wrangler Toad

Re: Little Compressor Issue - ???????

Reply #1 –
Do you have a slide?
Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320

Re: Little Compressor Issue - ???????

Reply #2 –
HWH level on? Try turning it off for TS

Re: Little Compressor Issue - ???????

Reply #3 –
Yes, have a slide.
Seems to have the same issue in Drive Mode and also on Auto Level.
Mark & Bev
2001 U295 36' Slide
Cummins ISC 8.3 350HP
Build #5802
Jeep Wrangler Toad

Re: Little Compressor Issue - ???????

Reply #4 –
Quote from: MarkC –
Yes, have a slide.


Aux compressor keeps the slide tank pressurized - you might have a leak in the slide plumbing.  First thing to check is the quarter-turn shutoff valve for the slide (if you haven't replaced it with a ball valve).  The OEM valves with the black plastic knobs are notorious to leaking.
Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320

Re: Little Compressor Issue - ???????

Reply #5 –
I didn't realize that there is a separate slide tank. Would you know the location, and what that tank looks like?
I do have a Viair tank that I assumed the previous owner added. That tank does get filled by the little compressor and watching the gauge on it, it doesn't seem to be leaking down.
Now you have me wondering if maybe there's a leak after that tank for the slide.  Other than the bladder, is anything else air related on the slide?  The bladder sems to be holding air fine.
Mark & Bev
2001 U295 36' Slide
Cummins ISC 8.3 350HP
Build #5802
Jeep Wrangler Toad

Re: Little Compressor Issue - ???????

Reply #6 –
Would anyone happen to have the air plumbing schematic for a 2001 36' with slide ?
Mark & Bev
2001 U295 36' Slide
Cummins ISC 8.3 350HP
Build #5802
Jeep Wrangler Toad

Re: Little Compressor Issue - ???????

Reply #7 –
Quote from: MarkC –
I didn't realize that there is a separate slide tank.
1. Would you know the location,
2. what that tank looks like?

Mark,

On a 34' that is that vintage that I have worked on that tank is hid in the most impossible place to get to.
1 you need to look above the front axle and behind the 2 main air tanks.
2. you will be looking for a cylinder that is about the size of a 80cf SCUBA tank.

Mke
Pamela & Mike 97 U 320

"It's not what happens to you, but how you react to it that matters."

Re: Little Compressor Issue - ???????

Reply #8 –
My slide tank of that vintage had a pinhole leak.  I replaced the tank, it was quite a project, still tracking down leaks.  The slide tank is in the front just behind the generator on my 2002 4020.
Herb and Willie
Escapees 90802
2014 IH-45 Build 6581
2002 U320 40' AGDS Build 6021 Sold
1999 U320 36' No Slides Sold
2007 Monaco Dynasty Diamond IV Sold
2005 Discovery 39 Sold
1986 20' Wilderness TT,  Died a natural death after floods, etc.
Walldog's Journeys
And Willie Said

Re: Little Compressor Issue - ???????

Reply #9 –
On my 2008 Nimbus it appears that the leveling system can call for the compressor overriding the pressure switch. I had an experience where, after the coach was leveled with difficulty, it settled, and the system tried to raise the left front. The suspension was topped out and the compressor kept running popping the relief valve. I could see that burning up the compressor so I will look to change that. For now, I am more careful of leveling conditions.
Dennis Haynes
Bohemia NY
2008 Nimbus 342 SE Carlyle
Build #6475
Motorcade #19148

Re: Little Compressor Issue - ???????

Reply #10 –
Quote from: MarkC –
Would anyone happen to have the air plumbing schematic for a 2001 36' with slide ?
There is a very nice detailed schematic of the air routing system inside you big White FT Binder, its part of the owners manual with all the system colored tabs.
Mike in AL
2001 U295
8.3 ISC 350
Build 5918

Re: Little Compressor Issue - ???????

Reply #11 –
These will be "close",  but they are for  2000 and 2003 ... If you get the exact one, please add it to the media section  ^.^d
The selected media item is not currently available.
The selected media item is not currently available.

2000 / 36' / U320 / WTFE
WildEBeest / "Striving to put right what once went wrong"

Re: Little Compressor Issue - ???????

Reply #12 –
Quote from: Dennis H
I could see that burning up the compressor

It's my understanding that the HWH controller will only attempt to level for a limited time (maybe 15 minutes?).  The compressor should be continuous duty rated.  I know it gets extremely hot but I'm not sure if that's a problem.
George Mann
2002 U320 #5934
2017 Rubicon
2013 BMW GS
Waterford MI