Mechanics

A/C IS WORKING FINE BUT WILL NOT AUTOMATICALLY SWITCH OVER TO RECIRCULATE (MAX COOL) ON WARMEST DAY LIKE IT IS SUPPOSE TO.

1989 GMC C1500 • 350,000 miles

Not sure what controls this function
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Jammocan
June 22, 2012.



Check actuator remove glove box see diagram find air inlet actuator turn AC to MAX actuator should close door


Docfixit
Jun 22, 2012.
They don't AUTOMATICALLY switch. You have a button to request that.


Wrenchtech
Jun 22, 2012.
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?


Tiny
Jammocan
Jun 23, 2012.