franey Posted October 20, 2008 Report Share Posted October 20, 2008 Recently needed morning defroster, and now my passenger side air blows cold when it should be hot. This happen once before when it was in warranty [96 SLS], and they replaced a valve. ;IF anyone knows which valve under the dash , I WOULD appreciate the help. If you know the section in the GM service manual , I have one and would gladly follow the replacement instructions. . THANK YOU FOR YOUR HELP. FRANEY Link to comment Share on other sites More sharing options...
Ranger Posted October 20, 2008 Report Share Posted October 20, 2008 Might try flushing the heater core. Link to comment Share on other sites More sharing options...
BodybyFisher Posted October 20, 2008 Report Share Posted October 20, 2008 My 96 Deville has an actuator that varies the temp between cold and hot. When mine was bad, it set a code. Check for codes. Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
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