How to Use a Thermostat with an Evaporative Cooler

There are many devices and gadgets designed to make life easier. They’re easy to take for granted, but we’d be lost without them. Thermostats are high on that list. Over half of the electricity demand in the United States involves thermostatically controlled loads.

Most people are familiar with thermostats for heating and cooling. For home cooling situations, a thermostat isn’t relegated to central air conditioning. A thermostat can be used with many evaporative coolers. It is important to note that there are differences in the thermostats made for air conditioning and those made for evaporative cooling.

A thermostat for air conditioning will not work with an evaporative cooler. Traditional AC thermostats are only low voltage and do not have the additional control needed to operate an evaporative cooler. This would also include current “smart” thermostats on the market.

There are options available. We like the MasterStat Evaporative Cooler Thermostat. It is designed to operate a 2-speed fan motor, small water pump motor, and an optional water purge pump. It will work with a single phase cooler with a 1 HP or less motor. This makes it a great, universal choice for an evaporative cooler thermostat.

There is one class of evaporative cooler that should never be used with a thermostat, however. Remote controlled window units will not work with a thermostat. The electronics will cancel out each other, and it will not function. Does this apply to you? No worries, as you have an option!

A programmable timer can be plugged into the outlet where a window unit is located. Plug the cooler into the timer, and it will function as a thermostat.

Now that you’ve got the lowdown on thermostats, you’re ready for the summer season. Still have questions? No problem! Our Customer Service Team is here to help with product recommendations, troubleshooting, and assistance with order placement. Reach them at 800-643-8341, Monday through Friday, 7:00 am – 5:30 pm CST.

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