How to Replace an Evaporative Cooler Motor

What You'll Need
Replacement motor
Soft cloths

You may find it necessary to replace your evaporative cooler motor at some point. An evaporative cooler is also known as a swamp cooler. It uses evaporation of water to cool the air. Air passes through a wet filter which consists of pads. The air is cooled in the process. A water pump supplies water to pads which keeps them permanently wet. The cooled air is distributed throughout the house by a fan motor. With time, the motor may decline in efficiency or develop some mechanical fault. If you replace the faulty motor, it should restore the good condition of your swamp cooler.

Step 1 – Remove the Access Panel

Turn off the power supply. For extra safety, unplug the cooler from the power outlet. This will keep you safe from electrocution. Remove the screwdrivers that hold the access panel in place. Place them in a safe place.

Step 2 – Remove the Belt

The motor is usually attached to a belt which also goes over the pulley. Use your wrench to remove the bolts that secure the belt. Remove the belt from the motor and pulley. Inspect the condition of the belt. If you find that is frayed or damaged, it is best to replace it. Obtain a belt that is similar to the old one.

Step 3 – Remove the Motor

Unplug all wires connected to the motor. Use your wrench to remove the bolt that holds the pulley in place. Unfasten the bolts that attach the motor onto its mount. Place the bolts together with the screws removed earlier. Remove the faulty motor and place it aside.

Step 4 – Clean the Inside

With the old motor removed, it creates a good opportunity for you to clean the inside of the cooler. Use a soft, damp cloth to wipe away dirt from the inside of the unit.

Step 5 – Install New Motor

Remove the new motor from its packaging. Place it onto the mount. Fit in all the bolts to secure the motor firmly in place. Return the bolt that holds the pulley in place. Ensure that the pulley is correctly aligned to enable it work properly. Use your wrench to tighten all bolts. Attach all wires you may have unplugged earlier to the new motor. Be sure that the wires occupy the same position as before.

Step 6 – Install the Belt

Return the belt over the motor and pulley. Adjust the belt to the proper tension with the help of the belt tensioner. Once you have the correct tension, return the bolts that secure the belt in place.

Step 7 – Test the Evaporative Cooler

It is best to confirm that the newly installed motor works as it should before you return the casing. This allows you to make adjustments if something isn’t fixed properly. Plug the cooler into the power outlet. Turn on the cooler to test if it operates as it should. Once you’re satisfied that it is functional, return the access panel. Secure the panel with the screwdrivers removed earlier. Wipe the outside of the cooler with a soft, damp cloth.