The heating and a/c does not work in my car what could be the problem? on 2005 Chevrolet Cobalt

I changed the blower motor resistor. But the switch to control the temperature still doesn't work but I also did some research and it said it could be the blower motor itself. Any ideas on how to find out what the problem is?

by in Milwaukee, WI on August 07, 2013
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1 answer
ANSWER by , August 08, 2013
IT COULDB BE MANY ISSUES SEEK DIAG AND EST TO BE SURE