Repairing used evaporative coolers requires the homeowner or building manager to diagnose the problems and either replace broken or worn-out parts or mend individual components or locations. The most common parts that wear out are the fan, motor, drain valve and water pump.
For major repairs, homeowners may need the services of an electrician or HVAC specialist. These situations include repairs to the motor or to the electrical lines connecting the motor to the fan.
Smaller repairs require only replacement parts, such as a new water pump, drain valve or water pads, or a bit of scrubbing to clean a moldy reservoir basin.