Is the drain plugged when the AC is on?
Is the drain plugged when the AC is on? One question: does your car leave a trail of condensate water when the AC is on? If so, the drain is not plugged. What did GM use to clean the evaporator coils? GM used to have a Goodwrench kit that the techs could use to clean the evaporator coils. It used a low strength solution of chlorine dioxide. The tech would remove the heater coil on top of the evaporator box or if necessary, drill a hole to allow the solution to be squirted down into the box. Why is the...