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Topic: Aux Compressor Blows (Read 271 times) previous topic - next topic

Aux Compressor Blows

Jimmy is FINALLY getting around to trying to figure out what's going on with our auxiliary compressor. It is working, but it just blows air and automatic drain valve never closes.

Jimmy thinks the valve could be bad, but hasn't discounted the filter, solenoid or check valve.
I've spent some time trying to find parts without much luck. Any suggestions, part numbers or other advice?
Christine & Jimmy
Nomadic, Full-time Life in Progress...
1997 U295/36/C8.3
600 AH BB-LiFePo/1080 Watts Solar
2020 Jeep Cherokee Trailhawk
** Social media: curiosity-in-motion

The cure for boredom is curiosity. There is no cure for curiosity. ~Dorothy Parker~

Re: Aux Compressor Blows

Reply #1 –
When the solenoid had power it closes off. Opens up on power loss.  Need to verify it has power.

FOT has them.  They had them on sale earlier this year on their web site but I just looked and don't see it on there anymore.
2014 ih45  (4th Foretravel owned)
 1997 36' U295 Sold in 2020, owned for 19 years
  U240 36' Sold to insurance company after melting in garage fire
    33' Foretravel on Dodge Chassis  Sold very long time ago

Re: Aux Compressor Blows

Reply #2 –
Auto drain valve outlet is threaded 1/8" npt.  Put a pipe plug in it and see if your compressor will build pressure as expected.  If it does, remove once compressor stops running for that cycle, then look for power at solenoid.  Could be power or solenoid issue.
Keith
2003 U320 38' #6197

Re: Aux Compressor Blows

Reply #3 –
Very common for the seat on the plunger in that one to get fouled.

HWH Solenoid Valve Rebuild

Also look for cracks around the fittings at the bottom of the bowl - lots of thermal stresses.  We helped another Foretravel owner diagnose his in the FOT parking lot when they couldn't fit him in for service - massive crack in the condensate bowl. 

HWH Filters and Bowls

If you're replacing the NO solenoid valve AND that condensate bowl is older/original, consider replacing both.

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: Aux Compressor Blows

Reply #4 –
Quote from: Vossx2 –
Jimmy is FINALLY getting around to trying to figure out what's going on with our auxiliary compressor. It is working, but it just blows air and automatic drain valve never closes.

Jimmy thinks the valve could be bad, but hasn't discounted the filter, solenoid or check valve.
I've spent some time trying to find parts without much luck. Any suggestions, part numbers or other advice?

I've had pretty good luck ordering parts from HWH online.  Ordered both the bowl and water trap solenoid and received them in a couple of weeks.  RAP90161 (AP6748) – HWH® Corporation

Northwest RV supply also carries a good supply of HWH parts:  RV Parts Categories - Northwest RV Supply

The water trap solenoid failed on our coach while traveling  and we just plugged it up and went months without it.  Never enough water in the bowl to worry about, but it easily unscrews should you need to empty it. 

I carry a spare bowl now (and plug) as it seems they can get hairline cracks/leaks




Joe Phebus and Jaime Trujillo
2002 U270 3410  Build: 5953 Motorcader # 18595
2100 W Solar, 600 AH Battleborn Batteries,  Victron Multi-Plus II 3000 Inverter, Cerbo GX, & MPPT Chargers
1992 Geo Tracker