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Front Driver side slide-opens 1 inch on its own

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Joel Ashley:
No, the techs at Gary's RV in Eden, ID, replaced the solenoids.  It was under warranty (the coach was only a few weeks old).  Scary, though, to look in my side mirror on the I-84 at 65 mph and see the slide sticking out a foot.  I pulled over and used the switch to pull it back in, but on a nearby gravel farm-country road to a relative's farm 15 minutes later, it was coming out again.  Fortunately Gary's RV was only a few mile's away.  At that point as a first time modern diesel owner I didn't know squat about slideout systems or mechanisms.  

Only one solenoid was leaking, but they work in pairs (extend and retract), so HWH told Gary's to replace the set of 2 for that slideout.  Reckon you could call Loren in Bend or call HWH for info on the feasibility of replacing a pair yourself, but as I recall it didn't take long for Gary's tech to fix, so you might get a quote from nearest HWH authorized facility and maybe just let a pro do it.  As Dennis mentioned, the solenoid manifold/reservoir is up front and not too hard to find.  Could be just a check valve O ring in the manifold.

Hopefully someone with some experience with solenoid switchout will chime in here.  I wouldn't try it without talking to HWH first.

Try here, but I don't know yet exactly which system to select:  http://www.hwh.com/flow3.html

-Joel

Larry and Heidi Lee:
Hi Joel, how did you resolve your problem? Did you perform the replacements yourself or ?

Arden Smith:
If you take a thin piece of ferious metal such as a 6 inch scale used by machinists and hold it close to the end of the solenoid while it is being activated you should feel the scale being pulled in towards the solenoid because of the magnetism created by the energized solenoid. This should tell you which one is activated by feel rather than sound.
Give it a try.

LarryNCarolynShirk:
You could disconnect a solenoid and try to operate the slide.  If it fails, you got the correct one.  If not, reconnect that one and try another.

Larry

Larry and Heidi Lee:
Thank-you everyone for your response. I have spoken to a technician at HWH (the manufacturer) and have discovered the following:
When operating your slide, always hold the extend or retract switch for 3-4 additional seconds after the slide has opened or closed. This helps to build up pressure in the system.
Depending on your manifold you could have one or multiple check valves. In my case I have one check valve which means that if the check valve fails all the slides will creep out. This can be determined by looking at your manifold. The check valve is located between the solenoid bodies and looks like a 5/8 bolt head facing the front of the motorhome.
To determine which solenoid controls which slide in my case I have 2 banks-4 extend and 4 retract solenoids. In both banks the first 3 solenoids are grouped together while the 4th is by itself. That 4th solenoid always designates the "first" or driver side front slide (living room in my case). I am told that the wiring to the solenoids should be labeled "extend" or "retract" so I can determine which is which.
I need to do some additional testing but I am told the problem is most likely the extend solenoid which runs $155 direct from HWH. To replace you simply disconnect the wiring to that solenoid, unscrew the old one and screw in the new one. No bleeding necessary. Re-attach the wires and you're done.  :P I'll update you all again should I get to that point.

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