My upstairs unit went out, the repairman came out checked the attic said everything was okay and somehow got the unit working again. He noted that some of the fins were closed. 1 month later it went out again. Another company came out, 99% of the fins were bent and he said that the unit had been power washed. I know that is not possible because we have not even power washed our home and also the downstairs unit is only about 12" away from it and has not been damaged. I need to know if there is anything, maybe mechanical that could cause this to occur.