Hi I have been a member of various mercedes forums over the years and this one by far is the best and most informative. I always find interesting topics and receive help almost immediately
Anyway my 2003 cl600 with 53k mi is having air conditioning issues. When I leave the office at 5pm after the car has been in direct sunlight all day the a/c works for about 5min then starts to blow hot air for the duration of my commute home(approx 30min).
All the while the engine temp is anywhere from 80-100 deg/c. I think 80 deg/c is normal egine temp but it has been 90-108 deg/F here in Chino for the last couple of weeks. Before the "heatwave" the a/c was working just fine.
Also the aux fan is on and the the lower I make the temp the faster the fan blows.
If I happen to drive the car in the evening when its cooler out the air works like a charm.
Also on the weekend when I drive after the car has been in the garage all day the air works fine as long as I drive in the evening(after 7 or so) but if I drive during mid day with the air on said air works fine UNTIL I park the car for approx an hour uncovered then the a/c almost immediately begins to blow hot air.
Several hours later after the engine cools the air again works like a charm.
I believe the culprit to be a bad thermostat as the engine may be getting to warm and the thus causing the comprssor to shut off. Because I can not hear the comprssor cycle on and off.
Or a bad temp sensor on the compressor that reads the engine temp incorrectly and shuts off.
This all may be due to the ambient temp but shouldnt the a/c blow cold air in any case.
I have heard the term heat soak but Im not to familiar with the symptoms.
Any ideas..anyone with the same problems. Any feedback would be greatly appreciated.
Thanks In Advance
