Not sure what controls this function

1989 GMC C1500
350,000 MILES
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JAMMOCAN
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A/C is working fine but will not automatically switch over to recirculate (max cool) on warmest day like it is suppose to.
Jun 22, 2012 at 10:57 AM
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DOCFIXIT
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Check actuator remove glove box see diagram find air inlet actuator turn AC to MAX actuator should close door
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Jun 22, 2012 at 2:58 PM
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WRENCHTECH
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They don't AUTOMATICALLY switch. You have a button to request that.
Jun 22, 2012 at 3:32 PM
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JAMMOCAN
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Seems like actuator is working fine. Unfortunately my climate control panel does not have a max a/c switch. The owners manual says it switches to max (recirculate inside air)automatically when necessary.Any other ideas?
Jun 23, 2012 at 2:39 PM
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WRENCHTECH
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http://i1198.photobucket.com/albums/aa448/Wrenchtech/57433636.gif
Jun 23, 2012 at 2:45 PM