This might be common knowledge but it was a totally new situation for me with a new coach. Went to pick up my coach for a weekend camping trip. Started it up to pull it around to service the water and tires. And there was a red "system level" light on in the dash. So I went through several cycles of raising and lowering the coach. That didn't turn the light off. I had no clue what to try next. Luckily where I store my coach is a full-service facility so they have a service department as well. I went and asked a service advisor if he could get a tech to take a look at my coach and explained the problem. About 10 minutes later A tech came rolling up in a golf cart asked me what the problem was and I explained it to him. He walked in the coach and immediately went to the slides. He went through all four slides to verify that they were fully in and when that was complete the red light was gone. I thanked him and found out that he worked at Foretravel for 16 years prior to working at this place. I had no idea that the HWH leveling system looked at the slides as well. Hope this helps someone.
Whatever you are paying for storage is probably well worth it. Sounds like a great facility! Congrats on a "easy" fix.