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aux compressor revisited

Had the aux compressor worked on at HWH last May. Thought they got it working right. Just moved my coach less than 1/2 mile to get it ready for our road trip. When I stopped, the aux was running hard. I was happy to hear it running, but it didn't seem to want to stop. I crawled into the bay and looked at the inline gauge that I had installed, per HWH instructions, and it was wavering near 120.
I thought the limit switch would shut off at 90 psi??. Any ideas, or suggestions of how I change the cut off??
Glenn and Amy Beinfest
2001 36' U320
#5812
2014 Honda CRV

No Whining on the YACHT

Re: aux compressor revisited

Reply #1 –
Glen, do u have a PDF of the HWH aux comp guide?  It is in the HWH tech manual re: leveling and stuff.
Scott & Carol Seibert
2001 42' double slide U320 - Sold
Previous - 2002 36' U320

Re: aux compressor revisited

Reply #2 –
The small compressor will run until pressure builds to the limit.  It may produce more pressure until the pressure builds.  You can put an inline fuse in the power line (red) to the pump and pull the fuse. Or put in a relay in the power line and a switch on the side panel of the dash to enable or disable the pump. You can also interupt the power on signal from the pressure switch.

I did the switch in the powerline approach.  To operate the room seal, deflate or inflate, the pump needs to be on and running.

My pressure switch sticks some times but not often. I have a replacement to install. 

If your HWH tank is empty it could take 15 min to fill to pressure.  Much more than that and you have a big leak somewhere.  Don't let the pump run for any longer than that or you will wear it out.
Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN

Re: aux compressor revisited

Reply #3 –
I think page 10 starts with compressor. Might be worth a look. 

Do what Roger said.  ^.^d
Scott & Carol Seibert
2001 42' double slide U320 - Sold
Previous - 2002 36' U320

Re: aux compressor revisited

Reply #4 –
Agree, but doubt if it is leak if inline pressure on output of compressor is 120. Limit switch should shut off at 90, above that suspect stocking limit switch In any event interupt power to pump via one of the means suggested ASAP and let pump cool down
Tim Fiedler    2025 LTV Unity MBL on Order
2000 Chevy Tracker 2 Door Convertible 4WD Now lifted 4.5"
1985 Citroen 2CV6 Charleston
Murphy Rebel on wheels with 175HP Titan
Cessna P337
1980 48' Westport MY (!/4 Share)

Re: aux compressor revisited

Reply #5 –
Quote from: GleamB –
Had the aux compressor worked on at HWH last May. Thought they got it working right. Just moved my coach less than 1/2 mile to get it ready for our road trip. When I stopped, the aux was running hard. I was happy to hear it running, but it didn't seem to want to stop. I crawled into the bay and looked at the inline gauge that I had installed, per HWH instructions, and it was wavering near 120.
I thought the limit switch would shut off at 90 psi??. Any ideas, or suggestions of how I change the cut off??

Info on 2003 compressor system in link below, and see atchd photo as well.

In the attached photo - at far right in photo - see device with green spring. (It has a grey cover over it normally).  The nut adjusts pressure up and down. From memory (double check), clockwise increases pressure, counter clockwise decreases pressure.

Aux 12 volt compressor compartment "thumping" sound (actually air unloader)

Dan - Full timing since 2009
2003 U320 40' Tag 2 slide

Re: aux compressor revisited

Reply #6 –
I have installed an inline switch and did shut off the compressor. I thought the aux came on at 60 and off at 90. I can try and adjust the regulator. don't want to lose the compressor
Glenn and Amy Beinfest
2001 36' U320
#5812
2014 Honda CRV

No Whining on the YACHT

Re: aux compressor revisited

Reply #7 –
Hang on a sec Glen. As I recall you don't have a slide. Am I wrong? If no slide your aux ONLY comes on to level you. The tank pressure is irrelevant because the aux does NOT put air in your tanks, only the air bags and it comes on when tank pressure drops below 80 psi. It will cut off when you're level or in about 15 minutes. So......If the aux continually runs, you have a leak. If you do have a slide room.......nevermind.
1994 U280, Build 4490
Deming, NM.

Re: aux compressor revisited

Reply #8 –
He has slide. Has leaked before
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: aux compressor revisited

Reply #9 –
I gotta do somethin about this memory.
1994 U280, Build 4490
Deming, NM.

Re: aux compressor revisited

Reply #10 –
Quote from: Twig –
I gotta do somethin about this memory.
I drink to improve mine...
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"
 

Re: aux compressor revisited

Reply #11 –
Twig makes great cocktails. Yes, I have a slide.
Glenn and Amy Beinfest
2001 36' U320
#5812
2014 Honda CRV

No Whining on the YACHT