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Calling all swamp cooler experts

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Old 08-28-2019, 08:16 PM   #1  
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Join Date: May 2013
Location: Deep in the Duraflame National Forest
Posts: 1,534
Default Calling all swamp cooler experts

OK kids, a new one on me, I have a swamp cooler down in the shop, last week it started to act up, it would run OK on high mode for about 5 min, then go into about 3/4 speed, (somewhere between high and low speed) I looked at the AC current and voltage, when it's running right it's 5.1 amps on low (motor and pump) and right on 10.1 amps on high, AC voltage is around 117 VAC, when it acts up on high it goes to 8.2 amps, AC voltage drops about 4 volts.

I replaced the motor, still the same problem, I replaced the wiring to the motor, (12 gauge solid) same problem, I replaced the switch, same problem, I replaced the pillow bearings on both sides and used good oil, same problem.

I checked the new motor, when this happens the motor is quite warm to hot, now.......WHAT the heck is going on?????????? This unit has run fine for about 8 years, now this pops up......It's about 100 degrees F in the shade so I need this running.

Any one?
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