Beat Evaporative Cooler Mineral Buildup: Water Quality & Pad Care

If your evaporative cooler is leaving white dust on furniture or airflow feels weaker than usual, mineral buildup may be the culprit. Arizona’s hard water contains calcium and other minerals that can quickly clog pads, reduce efficiency, and shorten the life of your system. Fortunately, a few preventive steps can help you beat evaporatiev cooler mineral buildup and keep your cooler running clean and strong all summer.

Evaporative Cooler Mineral Buildup – Why Calcium Buildup Happens

When water evaporates inside the cooler, minerals are left behind. Over time, these minerals collect on pads, trays, and pumps. Hard water areas like Phoenix and Scottsdale accelerate the problem, making regular care even more important.

Signs of Mineral Trouble

• White dust or residue around vents

• Pads that feel stiff, crusty, or brittle

• Reduced cooling power despite normal fan speed

• Strange odors from stagnant water or deposits

How to Prevent Buildup

• Use quality water treatment: Tablets or conditioners help prevent calcium deposits and keep water moving freely.

• Flush the system regularly: Drain and refill the reservoir every few weeks during heavy use to keep mineral concentration down.

• Check the bleed-off valve: Some coolers include a continuous-drain option that removes a small amount of water to lower mineral content.

• Maintain good water flow: Ensure pumps and lines are clear so water spreads evenly across pads.

Caring for Your Pads

Pads are the heart of the system. To maximize their lifespan:

• Inspect pads at the start of each season for brittleness or heavy scaling.

• Rinse lightly with a hose (avoid high pressure) to clear loose deposits.

• Replace pads every 1–3 years depending on water quality and use.

Keep Your Evaporative Cooler in Top Shape

Consistent care of both water quality and pads makes a huge difference in cooling performance and indoor air quality. You’ll enjoy cooler air, fewer repairs, and a longer-lasting system.

Want a pro to give your cooler a seasonal checkup? Affordacool offers expert service to clean, maintain, and extend the life of your evaporative cooler. Request service today and enjoy a summer without calcium headaches.