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Old 08-22-2012, 10:52 AM   #1
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Dash AC Problem

My 2007 GMC 8.1 Pace Arrow has had some dash air problems. It's been in the shop several times now. They have replaced the compressor, dryer and condenser.
When the coach is at idle or you stop and restart the engine hot air comes out. The dealer is trying to tell me that this is typical for the workhorse engines and when you start driving on the road it will cool down. No cool air on idle.... Not sure if I'm buying that one!
Has anyone had this intermitent hot air problem?????
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Old 08-22-2012, 10:59 AM   #2
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I don't have a coach like yours but can say R134a requires a lot of air movement over the condensers to achieve cooling...poor/undersized condensers and chemical characteristics of the R134a create this. Do you have electric fans on the condenser? If so...are they running @ idle?
15 degrees of heat loss on a condenser when comparing the "in" and "out" temps of the condenser will REALLY make a difference @ the dash vents.
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Old 08-23-2012, 10:44 PM   #3
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Not sure...will check on this.
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Old 08-24-2012, 08:00 PM   #4
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Yes, I have had the same problem with 2005 Southwind. Dealer "claimed" that there was to much freon. I still have the same problem. I tend to thank it has something to do with the fans and cooling the condenser as previous posted.
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