Question about Mastercool 67471 Evaporative Cooler Air Conditioner

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My evaporative cooler is only blowing warm air through the home, even though the water is on and all windows are open. Can you help?

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Check if the water is getting into the unit. check if it is pumping any water over the filters. cooler will meet its limits at 90% humidity plus

Posted on Apr 04, 2011

  • Sherri Stanes
    Sherri Stanes Feb 02, 2014

    there is no water going to the unit at all...

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1 Answer

I have a Taiwan evaporated cooler, 120 vac 60 Hz 85 w. Does this unit cost a lot of electricity to run, or is it fairly energy efficient


evaporative coolers use a principle of blowing air though a filter that is water moist
the air passing through the water uses a heat exchange process as the water boils off, the air is cooled and so you get cooler air
very efficient in places where the humidity is under 80% but over that the water doesn't evaporate all that readily and so the effectiveness is reduced
basically the hotter the day and the lower the humidity the more efficient they are.
Cheap --yes as it only runs a small motor for the fan and an even smaller motor for the water pump, but you will need a regular water supply some units have a small tank which needs regular filling and others can be connected to the home water supply
it is not an air conditioner , simply an air cooler.

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What is wrong with my Goodman AC unit?


Sounds like it has no power getting to it at all. Dont forget that some circuit breakers have UP as ON and some have DOWN as ON. Do not just assume a common way is always the same. You may even have to have one UP and the other DOWN as on. Check what the switch or circuit breaker has written on it to be sure.
AIR CONDITIONERS run like a refrigerator, they manufacture their own Heat or Cool and blow air past the unit to give hot or cold air to cool or heat the Room. These do not require flowing water.
Sometimes people (wrongly) call EVAPORATIVE COOLERS air conditioners. (An evaporative cooler just blows AIR past flowing water to humidify the flowing air and therefore "cool" the area)
An evaporative cooler therefore would require running water and without flowing water, the unit may not start due to the installation of a "fail safe" switch. An evaporative cooler would generally have a large box mounted on your roof with open sides with filters which are kept moist by the running water and through which the fresh air is sucked and pumped into your home.
There are varying thoughts on both, I personally consider the REFRIGERATED style as the most effective type, but they are more expensive to install and run.

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1 Answer

Water dripping from inside top to bottom of cooler what is causing this and how can i fix it?


Coolers like yours create a lot of condensate. Every time the door is opened warm moist air enters and changes back to a liquid state on the evaporator coils behind the fan and area you see moisture dripping down from top and back wall should be going down a drain pipe to the bottom of cooler and into a pan where a fan blows warm air over the condensate/water returning it back into the store or business that the cooler is located. Looking inside there shoud be a tray or pan that is at the base of the evaporator. True uses different parts but you need to see why the water is leaking from. If cracked tray or line blockage causing overflow into the cooler. Click Here=> Leaking Refrigerators and then again here=> Leaking Refrigerators! This will help you get a better idea of what I am talking about, if helpful please rate. True MFG. does not share their information to me. I would need to be their registered customer to get answers. Click Here=> E-mail True Technicians I also think if you have questions for them they ask for your model number as a reference. They Will answer you just need that number along with GDM-72-RC I will be here if you have questions, Thank You, Sea Breeze

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1 Answer

What direction should the outside fan be blowing air . Should it be out over the evaporator or sucking outside air inward over the evaporator, which if this is the case it would be pulling hot air over the...


Those condensing units are usually designed to draw air in, even though it is warn air it is cooler than the compressor so the air moves heat away from compressor. I think its the proper configuration

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The solution is to install "up ducts" These devices are easy to install and are fairly cheap. With a swamp cooler the best way to use them is to allow them to draft outside with the "up duct" you get the drafting to the outside but also get to remove attic heat too.

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Hi and welcome to FixYa. The principle of operation of an evaporative cooler is to provide cooler air via evaporation. The evaporation process is achieved by water being pumped over very porous pads with air is drawn through the pads. Most all evaporative coolers unless connected with a centralized heat / cool system only have an on / off & cool function. "On" is fan only (air circulation while using outside air being drawn into the home) and "cool" turns on the pump to pump water over the pads for evaporative cooling. Hopefully I did not confuse you with my answer.

Happy New Year and thanks for choosing FixYa,

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Make sure you have water to the unit, the water pump is on and the fan is working. No water=no cooling.

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The fan should blow air into the heat sink. The warm air exits the heat sink at both ends. (It might work the other way, haven't tried it.)

When you have ice in your cooler, you know the thermo-electric element is working well--it's below freezing!

Ice builds up because there is water in the cooler. For example, in humid weather, you open the cooler, some humid air gets in, and the cooler temperature condenses the water. You have to empty this water, either by tipping the cooler, or using a sponge.

You can easily defrost the cooler by unplugging it for an hour or so. You know it's time to defrost when you hear the fan blades making a racket because they're hitting something--a thick buildup of ice.


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