Skip to main content ↑ ↓
Topic: 12 volt compressor running constant  (Read 226 times) previous topic - next topic

12 volt compressor running constant

The 12 volt compressor in the basement was running non stop, pulled the fuse.

Constant air flow out of valve by compressor.  Not sure what term to search to find previous threads on this issue.

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

Re: 12 volt compressor running constant

Reply #1 –
HWH Solenoid Valve Rebuild

HWH Filters and Bowls

That's the bowl with the NO solenoid that's supposed to close when the aux compressor is running and open when it's not to expel condensate (and unload the compressor).  Valve seat is notorious for picking up schmutz as the condensate blows out when it opens.  We always carried a spare/rebuilt one (solenoid valve), so check your "box o' parts"  ;) )

ETA there should be 12V at that solenoid when the aux compressor is running in order to close that solenoid valve.  Check that as well.

ETA2 - if the bowl itself is cracked, FOT parts is going to be your quickest solution.  Northwest RV Supply does do drop ship from HWH on some of the RAPxxxx parts as well.
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: 12 volt compressor running constant

Reply #3 –
Thank You!!!

There was a previously cleaned used  solenoid in the parts box.  I installed that and then cleaned out the one I removed for future use if needed. 

Most of the debris was in the bowl itself, very little in the solenoid.

Working great now.

Fast fix on a Sunday with your guidance.
Dan - Full timing since 2009
2003 U320 40' Tag 2 slide

Re: 12 volt compressor running constant

Reply #4 –
Glad that fixed it!

That NO solenoid was Steve's version of the furnace in "A Christmas Story"...  I don't think one ever lasted more than 3 years before we had to swap it out again. 

Speaking of which, I need to get a spare one for our new parts box (it's number 150 on the "Coach Projects" spreadsheet, and I won't share the adjective I included in the description  :-X .)  Happy to take a used one off someone's hands if they aren't going to refurb it.
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: 12 volt compressor running constant

Reply #5 –
Carry a 1/8 inch pipe plug which in an emergency you can screw into the outlet where the air was coming out. That way you can still get air pressure to operate the slide rooms.
previous 1984 35 ft ORED 250 HP 3208 Cat       
previous 1998 40 ft U295 CAI 325 hp Cummins
previous 2003 40 Ft u320 build #6140 450 Cummins M11.                                                         
1999 Mazda Miata
Ron, Nancy, Tipper the cat, Max The dog
1997 U 270 36 ft build number 5174 8.3 Cummins