blower motor only works sometimes
My car has 130000 miles.
You may have a blower motor that has "dead spots" when it's winding. Sometimes you can tap on the motor if it doesn't start to move again. I would try performing this simple tap test and if it starts to move then you know that the motor is defective and will need a replacement.
If you decide to get this fixed, contact a certified mechanic who is capable of properly diagnose your A/C issue and fix it accordingly.
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