why? I put the button on defrost front windshield air comes out of the correct vents. but cold air only helps just a little while warm air makes it worse why is this? I don't like driving in a 60* car while its 40* outside

 

Retrieve a DTC from climate contol unit. Turn the ign sw to ON (II). Set the temp control dial on MAX COOL, then slowly to MAX HOT. After 1 min, press the AUTO button and then the OFF button. Continue to hold both buttons down. If there is any abnormality in the system when both buttons are pressed, the temp indicator will light up the segment (A to N) corresponding to the error. The temp indicator will the alternate every second between display "88" (all segments lit) and the error segment. If no abnormality the segments will not light up.