car a/c blowing hot and cold air

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  #1  
Old 08-31-10, 11:35 AM
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Smile car a/c blowing hot and cold air

Hi, my van's a/c blows cold air fine, but intermittently blows very hot air for 10-30 seconds on average. Seems to blow hot air more often when I'm decreasing gas, coasting, or at a stop. took it to the dealership - they recharged a/c, but its still happening. any suggestions? thanks!
 
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  #2  
Old 09-01-10, 04:29 AM
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Location: Ontario, Canada
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Although it doesn't say what year,make,model, it sounds to me like a vacuum problem. Your blend/air door etc may have vacuum lines running from dash control to various controls in heating/AC system. You should have a main feed from engine compartment going through firewall to control at dash, then it's distributed from there as necessary depending on what mode it's in. Check for a leak, bad check valve in the line etc.
 
  #3  
Old 09-01-10, 12:58 PM
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Location: Austin, TX
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Do you work on this van youself? If so then you know what the guy said above - sometimes I have to ask for more information because I am not a guru person yet. I have learned more on this site then ever. I will say I have been very proud of the information and what I did with it -
 
  #4  
Old 09-02-10, 01:45 PM
Join Date: Jun 2010
Location: Canada (near The Motor City)
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Originally Posted by username View Post
Hi, my van's a/c blows cold air fine, but intermittently blows very hot air for 10-30 seconds on average. Seems to blow hot air more often when I'm decreasing gas, coasting, or at a stop. took it to the dealership - they recharged a/c, but its still happening. any suggestions? thanks!
Yes, I have a great suggestion. take it back to the dealer and get it fixed right.....

How do you expect help when you don't give make, model, mileage etc ??
 
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