Attic fan won't start


  #1  
Old 05-28-21, 10:44 PM
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Attic fan won't start

My 3 year old Quit Cool Tri Pro 6.5 won't start. It worked last summer but today tried to use it for the first time and I hear a "clunck" when I turn the switch on and the light on the timer flashes. Like it tries to start and something kicks in and shuts it down. A fraction of a second, not long enough to open the louvers.
I have not gotten up to the attic yet, just hoping to get some advice on what to look for.

Could a bad capacitor cause this?

​​​​​​What should I look for while I'm up in the attic?
 
  #2  
Old 05-28-21, 11:03 PM
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Welcome to the forums.

Is this what you have ?
It looks like it has two independent fans/motors.


QuietCool Tri pro




 
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Old 05-29-21, 05:05 AM
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Could be an obstruction of the fan or its drive. Don't know what the flashing light on the timer means but I would check the voltage at the fan motor. Needs to be 120 or 240 vac depending on the motor nameplate.
 
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Old 05-29-21, 06:59 AM
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The first thing to do spin the fan manually and see if spins freely.
 
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Old 05-29-21, 12:12 PM
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If you should need to contact the mother ship, here is their Tech Support https://quietcoolsystems.com/contact-us..
 
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Old 05-30-21, 02:41 PM
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Hi, could be a nest of some sort in there binding up the blades.
Geo 🇺🇸
 
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Old 05-31-21, 02:08 AM
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I went up there and saw no issue, but realized there are two independent fan units (2 motors) and that it was unlikely two of them would go bad at once, I bypassed the timer and the fans started without issues
I ordered a replacement 8h in-wall timer from Amazon and I suspect it will be it.

Thanks for the replies all.
 
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Old 05-31-21, 10:59 AM
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I ordered a replacement 8h in-wall timer from Amazon and I suspect it will be it.
Is the timer motor rated?
Motors draw a lot of current (more than a light) when first starting; even a 1/4 HP motor and you have two of them. This is my reason for asking.
If your original timer was not motor rated, the contacts in the timer probably burned up. Three years seems like a short life for a timer.
 
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Old 05-31-21, 02:21 PM
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The advertised amperage is 7.1A for the pair. The system included a timer originally.
 
 

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