Caring for Your Evaporative Cooler

Just as with a traditional air conditioning system, your evaporative cooler requires care to ensure it functions properly. Keep your home comfortable and your equipment working effectively by performing maintenance on a regular basis.
Why is Maintenance Important for Evaporative Coolers?
Maintenance is necessary for all mechanical equipment to make sure it is running smoothly. Maintenance promotes longevity, increasing the service life of your evaporative cooler by providing the care the system needs to operate at peak performance levels. Your evaporative cooler should be serviced two times each year, ideally before cooling season begins and halfway through the summer.
How to Maintain Your Evaporative Cooler
To keep your portable evaporative cooler or window evaporative cooler working properly, perform the following maintenance steps twice per year.
  • Remove the cooler’s pads and use a wire brush to clean away mineral scale that has built up on the pad frames. The frames can be painted with a cooler protectant to protect against rust and corrosion.
  • Drain any water from the reservoir and flush to eliminate deposits. Scale can be scraped off the reservoir pan. Paint with a cooler protectant to prevent rust and corrosion.
  • Components of the water distribution system (pump screen, pump impeller, and distribution tubes) should be cleaned and inspected. Cracked tubing will require replacement. Prevent friction and stress to the system by lubricating the impeller with approved motor oil.
  • All electrical wiring and switches should be inspected for safety. Worn insulation and components should be replaced before operating the evaporative cooler.
  • Ensure the belt tension and motor bolts are set properly; you should be able to manually depress the belt with your hand approximately 1 inch at its center.
  • Test the water distribution system; make sure the entire pad is wetted. If the distribution system isn’t providing adequate water, the efficiency of the unit will be reduced.
  • Ensure the reservoir will maintain approximately 3 inches of water, and adjust the float as necessary.
  • Install new cooler pads and reinstall pad frames into the evaporative cooler.