my 2005 chevy impala a/c most of the time blows really low no matter what speed I put it on. Sometimes, if I drive over 50 mph the air will blow faster & sometimes it will jump start the a/c to start
I don't think you have a problem with the switch, I think you are having an issue with not enough refrigerant in the system and I think you need to clean the condenser located in the front of the car with a good heavy duty cleaner...
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