[twindman]

On the way to the Goshen Rally in 2014 my slides started creeping out. The unit was a year old but had sat on lot for the whole time. I had it only a month or less. Tried closing the individual valve switches but didn't help. Called Tiara and took it in on last day in Goshen. After they had it a half day, they said they didn't have equipment to check such high pressure!!!!

However, they did get me in to Lippert the next morning at 7 a.m. Lippert didn't even check anything, they just said usually in this case it is the two biggest cylinders and just replaced them. Took a couple of extra hours for them to drive to the storage building near Notre Dame. On the road around noon. They creeped out a lesser amount on the way home and dealer just ran the slides in and out about 10 times and all was well.
So if the unit is new, try that. otherwise sounds like bad cylinders.