Heating & cooling

Start up the evaporative (swamp) cooler and check pads

A controlled seasonal startup helps identify leaks, mineral buildup, worn pads, airflow problems and water-distribution issues before regular evaporative-cooling use.

What typically needs to be done

  • Spring startup generally includes removing winter covers/weatherization, inspecting the pan and drain, restoring the water supply and checking the float/valve for proper fill level.
  • Pads are cleaned or replaced as appropriate, and the pump/distribution tubes are checked to make sure water wets the media evenly.
  • The blower wheel, belt (if equipped), motor, controls and cabinet are inspected before extended operation.

What you can check or prepare yourself

  • If the unit can be reached safely, look for cracked water lines, a dirty pan, deteriorated pads or obvious winter damage before turning water on.
  • After startup, watch for leaks and confirm water is distributing evenly rather than spraying or overflowing.
  • Note vibration, belt squeal, poor airflow or musty odor that persists after the initial startup period.

Step-by-step reminder

  1. Inspect the unit, drain components and water line before opening the supply.
  2. Install or inspect pads and confirm the pump distributes water evenly.
  3. Check the fan, belt and controls according to the manufacturer instructions.
Safety note
Do not climb onto a roof without appropriate fall protection or professional help.

Before you start

Review the manual for the exact appliance, system or material in your home before opening panels, disconnecting utilities, changing settings or using chemicals. Model-specific procedures and local installation details can differ from a general guide. Shut off power, water or fuel only when the manufacturer procedure calls for it and you are comfortable identifying the correct control. Stop if the condition you find is different from what is described here.

When to bring in a professional

The homeowner checks above can help you understand the condition of the system and prepare for service, but the higher-risk portion may require specialized tools, safe access, combustion/electrical knowledge, refrigerant work, pressure equipment or a qualified inspection. Use the typical-work list to understand what a proper service visit should cover, and hire the appropriate professional for work outside normal homeowner access.

Safety & responsibility

This guide is general information, not a home inspection or a guarantee that a procedure is suitable for your specific equipment or conditions. Follow manufacturer instructions and applicable codes, stop if anything appears unsafe or different from the guide, and use a qualified professional when appropriate. Read the site terms and limitations.