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Tips to Prepare Your Air Cooler for Winter

Last updated March. 23, 2019


If you use a air cooler, it is very likely that you understand the importance of preparing it for the winter season.

When the cold season comes, you are not going to be making use of the machine again until spring or summer.

During this period, you cannot just leave the machine sitting where it is. Without preparing the air cooler for the winter, it can be severely damaged before the next cooling season.

Generally, air coolers need to be winterized to prevent such issues as frozen water lines that may crack and become damaged as a result of cold weather; damages to the different parts of the machine as a result of frozen water or rust; and heat loss from the swamp cooler vent.

By preventing these and other minor avoidable issues, you will be able to save yourself air cooler repair and maintenance cost at the beginning of the cooling season. Winterization will also prolong the lifespan of your evaporative cooler.


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Knowing the importance of winterizing your swamp cooler, we expect that you will make that one of your priorities once cold nights become regular.

We also believe that you understand the need to get it right with winterization as any mistake can undermine your precious air cooler.

Whether this is your first time or you have been winterizing swamp coolers for years, the following tips will be helpful to you.

Do Not Forget To Disconnect From Electricity Before You Start the Process The need to disconnect the swamp cooler from electricity before working on it cannot be overemphasized. It is necessary that you do this for your own safety and also to protect the machine from electrical issues.

Since you are preparing the machine for a period you will not use it, you can certainly shut off electricity and disconnect it from power supply before doing any other thing.


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1. Disconnect and Properly Drain


The next thing to do after disconnected from electricity is to shut off the water supply. It is important that you take care to disconnect the water line and drain it completely.

Make sure there is no water left in the line as it can freeze and damage the water line during very cold times.

You should blow it out to ensure that all the water are truly gone, then tuck it into a warm storage place.


2. Ensure the Tank is Properly Drained


The pan is another place you have to drain properly when you are winterizing your swamp cooler. You can remove a side or two of the swamp cooler to ensure that the pan is properly drained.

Use a sponge to absorb any remaining water if there is need for that. Also, if you are afraid that the drain valve may not seal properly, use the sponging method to drain the pan.


3. Clean the Inside of the Air Cooler Thoroughly


It is very likely that the inside of your air cooler will have some mineral deposits or dirt. It is important that you clean it up thoroughly at this point.

If the dirt and deposits are not too much, you can use the sponge to wipe clean. If, on the other hand, there are lots of mineral and dirt, you can use a shop vacuum to clean before sponging it.

When you have sponged the inside clean, hose it with clean fresh water until it is very clean.


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4. Use Mild Detergent and Soft Brush to Clean

It is also important that you clean the exterior of the air cooler during winterization. It is advisable, however, that you avoid the use of strong detergent when doing this.

Use mild soap instead with a soft brush or rag to ensure that the paint and exterior coating of the machine is not affected. Clean carefully but thoroughly.


5. If Needed Coat with Watertight Metal Sealer


This is optional actually, but it can go a long way in making sure that your air cooler remains in a great condition when the next cooling season comes.

You will have to wait for the pan to become dry, then you coat the bottom with a watertight metal sealer.

This will efficiently protect it from rusting. You can also wait till spring, check for leaks and seal them up.


6. Change the Cooling Pads if Needed


Since you are not going to use the air cooler until the next cooling season, it may seem like waiting till that period to change the cooling pads is the best thing to do.

This is not really right, however. There are reasons it is recommended that you change your air cooler pads during the winterization process.

The pads also accumulate dirt and mineral deposit during the cooling season and leaving them in the machine that way can lead to rusting of the metal louvers.

Change the cooling pads during winterization instead of taking unnecessary chances.


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7. Use an Air Cooler Cover


It is also important that you protect your air cooler from weather elements during the winter. The appropriate air cooler cover will do that efficiently.

It is important that you measure your air cooler and buy a cooler cover that is the right size for it.

When you get the right size of air cooler cover, it will sit snugly on your machine and protect it from rain, snow, sun, dirt, or any other thing the winter season may throw at it.


8. Cover the Vent


The vent through which the air cooler blows fresh cool air into your house during the summer needs to be closed during the winter for so many reason. You definitely do not want chilled air entering your home during winter.

Also, the vent can be a source of heat loss when you are trying to improve indoor temperature during the summer.

You can seal the vent with a well-cut double piece of cardboard or a piece of insulation. Put the cardboard or piece of insulation into the opening and put the cover back on.

It is important that you winterize your air cooler when it becomes necessary to do that. Adhere to the tips above to make winterization efficient.

If you have any further questions, contact us and we would be happy to help you.