A/C swittch must be turned off then on to keep air cold on 1992 Subaru Loyale

I have a 1992 Subaru Loyale, great running car, but with an issue that is puzzling me. My A/C works ice cold, but then after a while the air starts to get warm at which point I have to turn it off then back on, which then starts the cold air flowing again. It is very consistent in doing this, but I am afraid the turning on and off to maintain coolness will eventually hurt something. Can anyone give me some insight as to what is causing this? Thanks!

by in Tucson, AZ on July 25, 2010
1 answer 1 comment
ANSWER by on October 24, 2010
The evaporator coil is freezing up due to hot ambient air temperature and by turning it off gives it a little time to defrost. Try running the A/C in RECIRC mode instead of FRESH mode. This will help with frosting up
COMMENT by on October 25, 2010
Thanks so much... I will give it a shot... wish me luck!.. Thanks again..much appreciated!