Has the spring tension been lost or is it just the release latch that isn't working? On ours, the release cable is connected to a push button on the wall and it takes quite a bit of force to release it. When latched, I can still push down about 1/4 inch but it takes considerable force against the spring.
2015 Rockwood Signature UltraLite 8282WS Platinum, GY Marathon LRD, TST 507RV TPMS
2005 GMC 2500HD CCSB D/A, Curt E16, Prodigy P2, Garmin RV760LMT w/BC-20 b/u cam