Question about Mastercool 67680 Evaporative Cooler Air Conditioner

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I installed a digital thermostat to my Master Cooler. After the pump runs for a few mintues the Fan shuts off. What did I do wrong?

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Hi there,

It seems like you do some wrong with wire connection, may be some wire get loose or may be some short circuit, check that.
Double check that all.

Thanks

Posted on Jul 12, 2009

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1 Answer

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Posted also on the Cooler quick cycling problem:
My Master Stat Controller (CC2000A Rev 2003) was in 2 parts. The Thermostat unit in the house and the Power Control unit in the Cooler. The power Control unit was mounted on the squirrel cage fan housing so it vibrated some when running. That means the components vibrated slightly with respect to the PC board. Especially the larger components. My first symptom - Intermittent failure to turn the water pump on. I could see a faint crack in the solder around the pin of a relay on the PC board. Re soldering the PC pins solved that problem. Later, the second symptom was quicker than usual on-off cycling of the fan. I re-soldered all the pins on the PC board and all problems subsided. A better mounting place for the Power Control Unit would be good, but outside of the cooler might be a thermal problem here in the hot desert south west.

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1 Answer

Have a master 165,000 btu turbo heater it always starts and runs but sometimes it will run for 5 minutes 7 or 10 no matter where i set the built in thermostat,any tips ????


I would start by checking the fuel filter form the tank to the nozzle. If this is getting dirty the heater will slowly start loosing the red glow on the nose cone until the until shuts down.
Normally if it sets for a few minutes it will start and run again.

You can order a filter replacement kit that has all of your filters included.

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2 Answers

Ive got a 323ci bmw on a 2000 plate with 23000 overheatin


repl temp sensor. run 12v to motor, does it run? could be resistors, they're hidden all over the car, thanks to the ******* engineers that put this piece of **** together. or the fan blades could be blocked.

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check to see if fan clutch is working properly.

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1 Answer

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check the thermostat it could be sticky or just stuck shut it could also be,,, a blocked rad,,,, running with a very week fule mix, (wrong muffler fitted will do this),,, a water pump fault,,,, or a faulty water temp censor,
or worst,,,a head gasket blown!!! or cracked block!!!
change the thermostat first, its the cheapest part,

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1 Answer

Compresor turn off every 3 mintue


ya the compressor might be switch off by the thermostat . the thermostat setting might be not cool or # 2. Or thermostat need replacement if you had set it to the cooler side.

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Few things to check here. If the compressor is not running then the problem may be a bad thermostat or the compressor start device (ptc starter). Most common would be the thermostat on wine coolers. Also need to check if the fan is running. If everything is running then you have a sealed system problem. If the fan is the only thing that is not running that will cause a no cool situation.

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