A/C Runs warm when car stops or slows down - PeachParts Mercedes-Benz Forum

mr benz · #1 06-25-2004, 10:04 PM

I have a 190 e 2.3 and i have had ongoing ac issues some things were replace such as the compressor ,dryer and the expansion valve, ive continueously had plobems even thogh those things were changed.
Ive leaned alot from this forum and have done , some of the suggestions given her.
my issue these day are that when my system is charged up ofcourse my a/c reuns cold, it will last and produce cold air for about two weeks ,
.its as though my a/c run perfectly.
After about 2 week or when the weather gets super hot the ac acts up.
If i am at a stop light if will bloww luke warm air, ,when i get on the express way the air gets cooler almost cold, local stop and go traffic seems to have an effect on my ac, if im constantly moving i get better coolir results .
What is the issue here?

Any suggestion?
My aux fan and condensor fan works, my cooland switch kicks these to fan on.
What are your sugesstions?

Gilly · #2 06-25-2004, 10:09 PM

Was the car converted over to R134a refrigerant when the compressor was replaced, and if so was the proper amount put into the system?

Gilly

brewtoo · #3 06-25-2004, 11:00 PM

You say it blows cold for two weeks. What do you do after that to get it cooling well again? Recharge it?

Is it simply leaking refrigerant?

mr benz · #4 06-26-2004, 12:44 AM

I have not converted the system, it is still the original 134,i constantly have to recharge the systwm in order to keep it cold.
Another forum member told me that it could be the (mode) door.
Its up in the dash area somewhere i dont know whow to get to it.
Could y ou please let me know what i would need to do to address this problem.

190edude · #5 06-26-2004, 12:15 PM

If it is original it would be R-12, not R-134. Anyway, if you are constantly having to recharge then you obviously have a refrigerant leak somewhere. My recommendation would be to get some dye, put it in and look for the leak. If you don't see anything then it is most likely hidden and you will need one of the detectors(sniffers) to locate the general area where the leak is occuring.

Gilly · #6 06-26-2004, 04:59 PM

That sounds like a good idea to me too. It is silly to blame some door or something like that on what the obvious problem is, which is that you have a refrigerant leak.

Gilly