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Posted by Rheilly Phoull on September 5, 2008, 7:03 am
Mikepier wrote:
>> Bob F wrote:
>>> I've seen a number of older exhaust fans that start very slowly. Turn them
on,
>>> they barely turn for up to several minutes, then finally speed up fairly
quickly
>>> to normal operating speed. Can anyone suggest why this happens, and a way to
fix
>>> them to operate properly?
>> First thing to try is lubing the bearings I would think
>>
>> Rheilly P
>
> If you are talking about the roof attic fans, the motor might be
> starting to go. They sell replacement motors at Lowes or HD and they
> are easy to change.
Sure, that will fix it but having spent a large part of my work life
sorting that sorta stuff I can tell you a lot of the time the motor runs
away with no attention until it stops or exhibits the symptoms described.
The manufacturers provide ports to apply periodic lubrication which are
by and large ignored by the average punter. A slow start is almost
certain to be an underlubricated bearing or one that has been worn out
by long usage or underlubrication, usually both.
Nowadays the cost of professional maintenance can exceed the cost of a
replacement (assuming you DIY) so there ya go. For me there is nothing
to lose with trying a squirt of light oil on the bearings before
spending ya moola :-)
Cheers ............ Rheilly P
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