no aux fan?
Often the brushes in the aux fan get grease or crud on them and that results in poor contact and no run. Sometimes you can tap vigorously on the fan hub when it shoulld be running and that will 'reseat' the brushes. Often though you have to either replace (lot of bucks) or disassemble the fan, clean things up, regrease the bearings and go for another 15 years.
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