No cool call at a club members house . I discovered drain line had backed up . I noticed upon inspection of system that the drain line float switch was stuck . It appears that the drain line backed up and the float switch did its job by shutting the system down . The float got stuck in the closed position so even after the water went down the system still wouldn't run . I had to blow out drain line and clean float switch of dried sludge which caused it to get stuck in the closed Position .