2007 Chevrolet Colorado air conditioner. What is wrong? 80000miles why does only on 2007 Chevrolet Colorado

only works on level 4

by in San Antonio, TX on April 22, 2013
2 answers
ANSWER by , April 22, 2013
Blower resistor is defective! Mounted beside the blower motor.
ANSWER by , April 22, 2013
Control system needs tested.