How to Troubleshoot a Swamp Cooler Motor Won’t Start

Swamp coolers are well-known for their ability to be environmentally friendly. Because it is typically located on the roof of our home, it is common for the Cooler motor to become damaged. For simplicity, let us pretend that the engine will not start.

Various issues can arise, ranging from moisture issues to water flow issues. Whatever it is, we can guarantee you that it is common and occurs in practically every user’s experience. Intermittent or non-existent airflow is a typical problem with swamp coolers. As a result, the engine does not start since the motor is not operating correctly owing to a lack of fresh air.

We’re here to reassure you that you shouldn’t be concerned at all. The purpose of this post is to discuss a common problem that occurs with the Swamp Cooler and impacts the engine. You may discover that the issues are not that serious and that they are things that you can resolve on your own.

How to troubleshoot your swamp cooler

How to troubleshoot your swamp cooler

Regular servicing and maintenance will keep your cooler running efficiently for a long time, but as with any electrical device, parts may eventually wear out and stop functioning. Usually, it happens at the most inconvenient time. Fortunately, the cooling system on these coolers is not complicated. They can be relied upon. Having a basic understanding of how to troubleshoot the evaporative cooler will assist you in getting your house or business back to normal faster. The following are things to look for if the device does not switch on.

Troubleshooting a swamp cooler


Essent  ial products

  • Check the power and fuses
  • To replace the broken wires

Check the circuit breaker from Amazon

  • Check your thermostat
  • To regulate temperature


  • Check the wiring
  • To fix loose connections

Circuit breaker

  • Check for an overflow
  • To avoid overflowing of water

swamp cooler

  • Check the belt and fan motor



  • Check the voltage
  • To check the flow of electricity


Voltage stabilizer

1. Check the power and the fuses

In part due to the fact that evaporative coolers have fewer electronic components than air conditioners, a blown fuse is the most typical reason for the unit not to start. If a fuse has blown, check the circuit breaker. In addition, the team may have a breaker inside that needs to be reset. It may be necessary to look further afield if none of the above suggestions seem to be the solution.

You likely have an electrical wiring problem that must be addressed by a professional if you frequently have to reset the device or replace fuses.

2. Check your thermostat

Check your thermostat

Your evaporative cooler is equipped with a built-in thermostat that adjusts the room’s temperature. It operates similarly to your home’s thermostat. You set the temperature, and the cooler turns off when the temperature in the room matches the temperature specified by the thermostat. When the temperature rises, the cooler is reactivated to keep everything cool.

If the thermostat is set very high, the unit will not turn on and remain off. When the thermostat is malfunctioning, the cooler cannot determine when it should turn on. Depending on the type, replacing the thermostat might be a straightforward or challenging process. If you’re not confident that you’re up to the work of replacing it, you should see an expert.

3. Check your wiring

A more complicated problem may arise if the fuses and power are not an issue. The wires that connect the breaker and fuse are the next thing you should look at. These wires must be in good working order to function correctly. A new circuit breaker will likely be required if the cables become dark or discolored, as well as stiff and inflexible. You can consult with a technician to decide whether or not you can reuse the existing wiring. What happens next is dependent on how badly they have been damaged.

4. Check for an overflow

Typically, water from a swamp cooler drips and collects in a puddle, making it unsuitable for storing elsewhere. Never keep a swamp cooler with its pads in place during the winter months. Instead, empty the unit and clean it before storing it until it can be used again. Because of an improperly installed floating valve, teams can utilize excessive water, resulting in a unit overflow.

Dripping water may cause the water in the motor to overflow. Consequently, the engine may become inoperable and suffer damage as a consequence. Consequently, ensure that your swamp cooler has sufficient dripping water storage.

5. Check the belt and the fan motor

Check the belt and the fan motor

If you haven’t located the source of the problem yet, it could be one of the cooler’s internal parts. The fan and the motor are connected via a belt. The fan will not operate if it is broken or removed. While it is possible to hear the engine going, the device is not creating any air because the fan will not rotate. Replacement fan belts are simple to come by, but you must first determine why the engine has stopped working before ordering one.

Your item should be operational again if the filter becomes filthy or broken. Depending on how it slipped off, you might like to have a specialist look at the engine. Another common reason for the motor to shut off is a failure. Switch on the fan for a few seconds and then turn it off to test for motor failure. Disconnect the connector from the socket using a screwdriver or other similar tool.

How hot is the engine? A replacement or repair of the motor may be necessary if this is the case. The problem will almost certainly require the services of a professional expert to diagnose and repair it.

6. Check whether the voltage on the swamp cooler is enough

Test the plug for current with a voltmeter. It won’t work correctly when you don’t have adequate electricity going to your swamp cooler. Using a voltage stabilizer can be beneficial, but you may want to consider having an electrician rework the system as well. When a device is consistently unable to work due to a lack of sufficient voltage, the wires become hot, and the unit as a whole may fail.

7. Other possible problems may include

Other possible problems may include

This could be the case if the evaporative cooler does not produce enough cooling. Inspect the unit to ensure sufficient water and that its water pump functions correctly. Also, make sure the distributor isn’t clogged by checking it out. The possibility that there is too much moisture in the air for the cooler to function if none of the other concerns are resolved.

A stale or mildewed scent indicates that your unit requires attention. At some point, the pads will need to be changed. This might lead to a buildup of old water in the sump pump. When you refill your unit with new water, add a teaspoon of vinegar to keep the water cleaner. To maintain the team clean, you must continue to pour fresh water.

Your evaporative cooler shouldn’t be leaking water at any point. Your unit can leak water for a variety of reasons. A thorough cleaning may be required. It’s possible that you mishandled the unit over the cold months. An adequate amount of protection should be provided for the unit. If the unit is leaking and you cannot determine the source of the leak, you should contact a professional technician.

Frequently Asked Questions:

  • At what maximum temperature will a swamp cooler stop working?

Swamp cooler is a type of cooler found in swamps. When the air is arid, such as in arid south-western climes with a relative water content of 30 percent or less, the temperature of the air can be reduced to 30 degrees Fahrenheit.

  • Can a swamp cooler work all through (24/7)

Coolers typically have a lifespan of between ten and twelve years on average. On a daily basis, it is preferable not to allow them to enter your home.


It is not commonplace for electronic and mechanical components to fail due to wear and tear. There are a variety of reasons why they can quit working. Keeping calm and searching for the source of the problem is the most important thing to remember in this situation. As previously stated, the most typical issues with swamp cooler motors are caused by specific processes. We recommend that you examine your cooler after you have gone through every aspect of it completely.

And, as usual, we recommend that you do not hesitate to bring in a professional specialist if you feel the need to do so. We have planned these processes so as not to have to spend any additional money. I hope this article has been of assistance to you.

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