Question about Cars & Trucks
Those brushes in the DC motor wear out and when they do, they squeal. You are very close to having no blower motor operation. You have to replace the whole motor. They are about 100 dollars at any auto parts store.
Posted on Dec 09, 2016
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Posted on Jan 02, 2017
Yea leafs and other debris can get in and cause the noise. Remove the blower, thoroughly clean the fins and reinstall. This should take care of the noise.
Posted on May 15, 2009
it is either a bad switch or window motor. finding a wiring diagram and shooting power to the correct wire will identify whether the switch or motor is faulty.
Posted on Jun 05, 2009
You must remove the motor to inspect for bent squirl cage (fan) for damage .your heating issue is seperate from the noise.you could have a bad thermostat check your temp gauge if its at least half way up to 200 degrees thermostat is ok then you will have to check heater core hoses for flow in and out to make sure they are hot. if all check out look at blend air doors make sure they operate.
Posted on Jan 06, 2010
Most GM vehicles have little flaps or doors to redirect the air near the blower motor. If that gets out of place or falls down it will rub on the squirrel cage of the blower fan. Some older cars have insulation in that area that might come loose and rub on the squirrel cage. The insulation sometimes is covered with a stiff paper. Cutting away the stiff paper with allow more clearance.
Posted on Jul 14, 2010
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