While the summer heat is sticking around for now, before long, it will be time to close down your evaporative cooler until next season. While the steps to shut down your cooler are less intensive than spring start-up requirements, they’re still important. Here’s a refresher so you can prepare for what’s to come! Before beginning any cooler maintenance, it is important to remember to turn off all electrical power to the cooler and to unplug it. Also, disconnect the motor.