1. HWH NOT HTH:B
2. Air in the bags or empty should NOT affect a HWH slide mechanism operation.
3. The HWH systems self purge, you just operate the jacks and slide room/s 3 or 4 times to purge any possible air
4. DO NOT INSTALL any other blocks to hold the room in. There is static pressure on a HWH slide cylinder and that is what is pushing the bottom of the room out. Not a big deal when you have top slide locks, but a big deal if you try to brace the bottom. You risk damaging the wall and inside fascia from the pressure pushing out the room
5. The MOST an HWH slide will extend with this type problem is 3 to 4 inches MAX, just keep retracting when it does this until you fix it.
6. The FIX is simple. IF you inspect the system and see no obvious external oil leaks the Extend and Retract solenoids for that slide need replaced. BUT, do this before you replace them. RETRACT the room and then open each solenoid (retract and extend for that slide) manually and that will purge any possible debris in the solenoid needle valves. The room will extend slightly when you do this (about 2 to 3 inches and no more. Retract and open the valves again. Then close the valves and retract and see if it stays retracted, IF NOT, then replace the 2 solenoids. The solenoids are leaking internally and that causes the room to slightly extend. Doug
