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Q:

a/c stops blowing cold on 2004 Honda Civic Si

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had system charged and when driving it stops blowing cold and blows cold for awhile. it will stop and start blowing cold while driving
(2) Answers
I had a similar problem with my Civic Si. Turns out that the A/C system was a little undercharged. I had the system fully evacuated and fully recharged to the proper level and haven't had a problem since. Also be cautious. Over charging a R134a system can cause a similar problem as well.