Why should there be water coming into both sides of the interior? on 2007 Buick Terraza

The ac drain hose has been checked by 2 different professionals and it is clear. The water intrusion begins about 20 - 30 minutes after the ac is turned on.

by in Lombard, IL on September 11, 2011
1 answer 2 comments
ANSWER by on September 11, 2011
When the engine is running with the a/c on do you have water running out the HVAC box?
COMMENT by on September 12, 2011
Yes, and no. It varies, depending on how the ac has been running.
COMMENT by on September 12, 2011
It doesn't matter how the a/c is running. When the a/c is on you should and must have water running out of the evaporator drain. Meaning water dripping outside on the ground. If not you have a restricted evap drain.

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