I live in a mobile home. I have a new 3 1/2 ton package unit-all outside/ Today the weather was really nice so I turned off the unit at the Thermostat and opened the windows. But I heard something and went to check. The fans on the outdoor unit are still running. It will not turn off. The thermostat is set on Auto for the fans. But where is says Cool off heat - I moved it to off. I finally had to go to my electrical panel- find the AC fuses and flip the main off. What can I do...