One of the trailers had this problem at the rally. Check the bolts out at the hinged area on both sides of the couch. The problem with the unit at the rally was the nut came off of one of the bolts. The bolt started to come out and got bent. This prevented the couch from functioning properly. Replaced the bolt, checked all the nuts for tightness, and it worked like new. Hope this helps.
2014 FR Heritage Glen 282RK
2013 F250 HD 6.7L Diesel
Formerly Owned: 1995 22D Fun Chaser & 2901L Classic