Evaporative Air Cooler Water Pump: What It Does

It moves water from the reservoir to the cooling media so airflow can pass over a wetted surface. Some designs use different water distribution arrangements, so follow the manual for your unit.

Common checks include an overfilled or mis-seated tank, a loose drain plug, a displaced pad, or a damaged hose or float. Disconnect the unit and consult its manual before opening or repairing it.

Water use depends on climate, airflow, operating time and cooler design. The manufacturer is the best source for a model-specific estimate; keep the reservoir filled only to its marked limit.

Use only treatments explicitly approved by the cooler manufacturer. The wrong chemical can damage materials or create unsafe mist, and routine cleaning may be specified instead.