hissing noise

[bkmphoto]

have owned our 2020 Pace Arrow 35qs for about a year. We've had a few problems, but nothing that was earth shaking. This last sunday when parked in our storage space, and started unloading my wife noticed a small hissing noise in which air was escaping somewhere. We have never heard this noise before. I crawled around underneath in the vicinity of where we were hearing the hissing, thinking it might be a propane leak, no.....no smell. We couldn't really pinpoint where it was coming from. We finally decided to go home. I went back to the storage unit the next day.....hissing gone. I started the engine for about 10 minutes and when I turned it off again the hissing was back. Does anybody have an idea of what it could be?

 

[NWIP]

I would suspect a leak in your air suspension