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HWH Active Air issue - left front cycling up and down while air leveled

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I don't think it's a leak. I think it's a valve that is not closing all of the way. When air is filled and then the valve closes it shouldn't allow air to flow back out and that's what I think is happening. The question is where is that valve? Is that the transducer?
 
Jerry, I'm going to provide the link you sent me here, don't think it needs to be private.


The check valve looks interesting but I think checking that manifold assembly for leaks is key right now as well and swapping transducers. I think (hope) the problem lies within that box and its components.
 
According to Mitch’s note, he thinks it’s a solenoid. If air were leaking externally you would think 1/2 dozen man hours of looking would have noticed it.
 
Well, seems easy enough. Any reason you haven’t replaced it to see if it resolves the issue? I remember before even getting AA @redbaron suggested getting a spare solenoid. At install I asked and they said no. Guessing I’ll get a solenoid and transducer from them.
 
My 80 year old body just didn’t want to try after my frustrations trying to change parts on the controller above the rear drive axle. It’s so hard to get to that the AA tech at HWH said it was difficult for him and required, for sure, that the coach be on a raised platform at head height. I haven’t even wanted to look at the front module but I will tomorrow and if I can get to it easily I’ll give it a shot. I know I deserve it but don’t shame me too much.😢
 
My 80 year old body just didn’t want to try after my frustrations trying to change parts on the controller above the rear drive axle. It’s so hard to get to that the AA tech at HWH said it was difficult for him and required, for sure, that the coach be on a raised platform at head height. I haven’t even wanted to look at the front module but I will tomorrow and if I can get to it easily I’ll give it a shot. I know I deserve it but don’t shame me too much.😢
The front one is much easier to access.
 
And I think we may be lucky for that, the one that has an issue is the one we can access. Jerry, I'm sure you've seen the aux compressor for HWH and probably had the ground wire issue if I recall, as did I. Right next to that is the contraption with the transducers and all.

When I get my coach to storage I'll do a quick test and leak check of that area and see if it reveals anything. But I'll also wait and see what HWH says and I may order two transducers, solenoids, and a check valve assembly for at least spare parts.
 
Jerry, I'm going to provide the link you sent me here, don't think it needs to be private.


The check valve looks interesting but I think checking that manifold assembly for leaks is key right now as well and swapping transducers. I think (hope) the problem lies within that box and its components.
Using the link you provided it looks like we can use it to order parts if needed. I was just dabbling, not cheap of course for spares so will continue to try and identify before anything is ordered.

hwh.jpg
 
First step - leak check
Second step - swap the two transducers and see if the issue switches sides following the change
 
Joe called while I was driving so I explained the situation. He seems very knowledgeable and agreed with my theory that the valve that opens to push air in the airbag for air leveling is not closing or sealing so it's leaking back out within the system as both of us can't find leaks. He told me the way they test is the remove the muffler on the manifold (the contraption we've been talking about, up front near the compressor) and they attach a tube to that port and put the other end in a jar of water to see if it bubbles. I asked him what's the fix and I'll order the part now to get it on the way. He said it's simple to replace, he's supposed to email me. I checked my email to see if I could get the part number but all I have is an invoice so I'll have to wait for it to arrive. It was around $215 for the part so I think it's the solenoid. He thinks debris got in it and that's what's preventing it from sealing.

Mine seems to be behaving and I'm at end of trip so I won't dive into troubleshooting right now and may wait for my next trip to see how things go but I'll definitely go to storage, in fact today I may do an air level and check the muffler for leaks while I'm there to see if there's anything obvious.

But in the end, I suggest calling Joe and talk to him of your issue @J&JD and maybe have send you the same part and let's see if in the end it really is something stupid simple. 563-946-6002 is the caller ID.
 
Thanks for the info. If I read correctly you did order a new solenoid? Or you are waiting for Joe’s email?
Crawled under the coach this morning and found my manifold. It is located in front of the left front wheel outside of the main frame member. Not a perfect spot but at least I can access it. I’ll wait until you hear from Joe before ordering anything and I’ll give him a call.
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I ordered a part from Joe. I’m not sure what it is exactly. Give him a call.
 
The other side of those air hoses are solenoids. I bet that’s the part coming. Let me know what you learn.
 
Sure wish that manifold was in a more accessible spot. Story of my life so it would seem. 😁 I did call Joe and am on the callback list.
 
Mine is not better. Started up to go to storage and front end was down. Immediately raised to ride height on start. Parked for 2 hours.
 
agreed with my theory that the valve that opens to push air in the airbag for air leveling is not closing or sealing so it's leaking back out within the system as both of us can't find leaks.
Reading back thru the thread, I reread this and had a question. Are you sure it’s the valve that adds air to the system that Joe is talking about? Wouldn’t it be the exhaust valve that is leaking as air is leaking out not in. Or are we just talking semantics here?
And, the mufflers are in the exhaust line obviously.
 
All I can say is I described the situation and he seemed to know the part to replace. I got an email from him which I haven't had a chance to read yet, just getting settled back home. After I parked at storage I opened the front to listen, didn't hear anything, didn't see anything happen, went in to do something and came out and left front was all the way down. I still didn't hear anything. I came in and put the key to accessory and checked the PSI's right away, left front was 21 psi, right front was around 70 psi. So I know it's the one area (left front). But if it was an exhaust leak I think I'd hear something, my hunch is the fill line has a valve that's not closing so there is no leak, it's all in the contained system (air lines) and just going back to tank 2 per se and not actually venting out of the system. I didn't try to repeat it, had to leave but it seems whatever the time interval is that AA checks for its pressures after engine stop such as air level update intervals, that's when it opened and lost the air to LF. In other words, the line is not maintaining pressure, but doesn't mean it's actually venting/leaking.
 
The front side of the manifold I can access, the back side is going to be a problem if I have to get up in there.

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Good afternoon Neal

I have attached to this email a drawing if you will of an Active Air
front manifold. I do not have one that is exactly like yours, yours will
have a module on the side of it and this one doesn't.

What I have done is mark which one is going to be the left lower valve
that will need to be replaced. What you will want to do is drop all the
air in the coach so all the bags are flat. Go underneath to the manifold
and locate the left lower valve and unplug it. Then once it is unplugged
use channel locks and simply unscrew it out of the block. Then screw the
new one in and then plug it back in and you should be good to go.

Of course before you drop the air in the coach you may want to drive the
front up on blocks (do not put the jacks down and crawl under it) so you
have room to get under the coach and work on this.

Hopefully this all makes sense?

Thanks

Joe
 

Attachments

  • 20250129_160406.pdf
    162.9 KB · Views: 13
But if it was an exhaust leak I think I'd hear something,
Hence the muffler that would stop a noise leak. I give…..I know nooothing. God I wish HWH were in Oregon or Nevada!

Welcome home. Order a large Hawaiian pizza and enjoy your evening.
 

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