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Old 06-16-2012, 04:52 PM   #1
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Whole house fan won't start


I just installed a Master Flow whole house fan (tandem fan model). When I press "On" using the remote control the lid opens like it is supposed to, but the fan does not come on. It continues to cycle the the lid for 3 times (open and closed) but the fans never start turning. After the third time opening the lid it turns itself off. Any suggestions? Is there a limit switch that needs to be set?

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Old 06-16-2012, 05:34 PM   #2
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Whole house fan won't start


It's a problem internal to the fan, internal to the remote, or internal to you (operator error). You are getting some power to the fan, at least enough to move the lid.
Check that the fan blades move freely.

Can you post operator/troubleshooting instructions? I couldn't readily find them. A schematic with parts list would be very useful.

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Old 06-16-2012, 07:57 PM   #3
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Whole house fan won't start


Is there a thermal override. Some fans will shut down above a certain temperature so as not to draft a fire. You may be able to set this. Seems like the fins/vents should close too though.
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Old 06-16-2012, 08:15 PM   #4
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Whole house fan won't start


Tech support is closed on weekends. The manual doesn't have any troubleshooting info nor does it mention a thermal override.
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Old 06-16-2012, 08:34 PM   #5
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Whole house fan won't start


I just read the installation instructions online and hoped to find a troubleshooting section. No luck on the latter. I did see your remote has a timer function? Any chance you engaged that? I still don't see why the hood would open and close though. Wiring looked straight forward and again the hood is working just not your fan.
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Old 06-18-2012, 08:16 AM   #6
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Whole house fan won't start


Does the fan spin freely by hand? If you missed removing all packaging/tape to keep the fan locked in place during shipping the motor would overload when you try to start.
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Old 06-18-2012, 10:21 AM   #7
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Whole house fan won't start


Thanks all. I checked to see if the fans rotated freely and they did, no packing material or locking pin. After I spun the fans by hand and pressed start the fans worked as they are supposed to!
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Old 06-18-2012, 10:24 AM   #8
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Whole house fan won't start


Just needed a jump start.

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