How to Repair a Swamp Cooler Leak

A swamp cooler.
What You'll Need
Wire brush
Acrylic caulk
Plastic gloves

To repair swamp cooler leaks, you need to inspect possible causes of the leakage. Such possible sources of leakage in a swamp cooler and the appropriate measures to correct them are explained below.

Step 1 - Get Started

Wear a pair of plastic gloves. Remove the side panels of the cooler that contains the padding. Please note that you might need to switch on the cooler repeatedly to diagnose the cause of the leakage. However, you should switch off the cooler and unplug it at the time of executing the repair.

Step 2 - Correct Swamp Cooler Leakages Due to Loose Copper Lines

The copper line or the main water line carries water into the swamp cooler. This line is secured with a thick nut called a compression nut. Use a wrench to tighten the nut. Turn on the water supply. If water is still dripping from the nut, you need to check the washer. Shut off the water supply. Disconnect the water line by loosening the compression nut. Inspect the inner surface of the compression nut and its washer. The washer should be replaced if it seems worn out. The insides of compression nut might be lined with deposits formed by hard water. Use the tip of a screwdriver or a wire brush to remove the scaly deposits.

Step 3 - Correct Leaks along Bottom of Swamp Cooler

The reservoir tray is prone to developing cracks. To identify this problem, switch on the cooler’s water supply. Now, see if water is escaping from the bottom of the cooler. Remember, coolers with reservoir tray cracks tend to empty rather quickly. Drain the remaining water from the cooler and repair the cracks. A few beads of an acrylic caulk can work efficiently in plugging the leakage. Another reason for water leaking from the bottom of the cooler can be a slack overflow pipe. Look to see if the pipe is properly positioned on to its drain hole. If not, use a pair of pliers to straighten and tighten the pipe.

Step 4 - Correct Swamp Cooler Leaks due to Leaky Pads

Leaks can be caused by the pads due to a variety of reasons. For starters, the pads should be properly fitted. Loose pads tend to deflect the water. Some swamp cooler models have a metallic, mesh-like structure to secure the padding. The mesh is secured along the inside of the side panels with screws. An unsteady mesh can cause the padding to protrude and cause severe splashing of water. Tighten the screws of the mesh with a screwdriver. Check the edges of the cooler’s body where the pads are inserted. These edges are often lined with deposits formed by hard water. Use a wire brush to scrape off such deposits.

Step 5 - Correct Swamp Cooler Leaks due to Float Valve Problems

You need to ensure that the water in the cooler doesn’t overflow. This, in turn, depends on the functioning of the float valve. Ensure that the float valve arm is properly positioned. Sometimes the float valve is deflected towards the edge of the water reservoir. Tighten the nut securing the float valve with a wrench. The arms of the float should not be bent. If this is the case, you need to replace the float valve.