swamp cooler diagnostic inspected tested swamp cooler found no issues or problems with swamp cooler. overflow drain not screwed on installed properly could possibly cause system to leak was not leaking at time of diagnostic due to the way the pipe was installed roof jack not being sealed could cause water to run down roof jack and into building this could cause the water issue the customer is having sealed roof jack. informed customer to run system and if problem occurs again will have to move stuff in warehouse and use scissor lift to get access to drain pipe attached swamp cooler may be leaking from there