Question about AC Cars & Trucks
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Posted on Jan 02, 2017
SOURCE: Blower AC fan not working.
Hope you have both fixed your problem by now; my system has been down.
In most auto applications, the bearings of small fans and motors are made of sintered phosphor bronze with graphite or petroleum lubricant embedded in it.
Since there isn't much load on these, the bearings can outlast the rest of the car but they do have a tendency to get gummy and since the fan motor doesn't have much torque, it may have trouble overcoming the stickiness and start turning.
If it wasn't for the buried location of most blowers, it would be a simple job to flush out the bearings with a penetrating lubricant such as WD-40 that is mostly volatile and doesn't leave much residue behind to complicate (gum up) things again.
This problem is common to some computer cooling fans too although many of the small CPU cooling fans actually have PLASTIC bearings!
Including some that were clearly marked as 'ball bearings.'
Some balls -
Posted on Aug 06, 2008
many vechicles have a relay that when defective does not allow low speed operation, (it usually controls the lo speed) check in the relay and fuse box, there may be two boxes one not as obvious
Posted on Oct 09, 2009
It sounds like your actuator door. Its the door that changes your temp from hot to cold and is located behind your dash. Hope this helps
Posted on Oct 27, 2012
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