My 1995 Seville STS has more blower motor problems. Now the fan goes into "turbo" mode when I switch it from "econ" to "auto" (A/C). All I have to do is change the speed to "auto/low" and it works fine. Once I switch the speed to "auto" (med) it starts off like a jet engine. What is going on? Could it be the control module? I already replaced the blower and 3 pronged plug. What is up?