[R129 SL] air conditioning issue

[gregorio at weststargroup.net]

Hi Jonathan;

Fantastic info, my friend!  I just changed the coolant about 6 months ago, but will bring this tidbit of information to my mechanic. The car only has 71K miles on it, and I keep it in top-notch shape. Thanks for your insight!

Cheers!

Greg from CA.
  ----- Original Message ----- 
  From: Jonathan Hodgman 
  To: SL Mailing List 
  Sent: Tuesday, July 05, 2011 5:26 PM
  Subject: Re: [R129 SL] air conditioning issue


  Sounds like your duo valve is acting up.  Pretty common given the age.  Do you flush coolant every 2-3 years?  

  Jonathan

  On 7/5/2011 5:31 PM, gregorio at weststargroup.net wrote: 
    Hi Group;

    Hope this post finds everyone well!  I have an A/C question about my 1991 SL that I'd like to pose the group. I had the system recently converted from the older freon used, and not sure if it is related.  But I have a problem with the cooling system going from cold to hot and then back again.  It seems to be cold when I first start the car, but if I make a stop, turn the engine off, and then re-start it, I get hot air for quite awhile. Sometime I have to actually turn the car off again, re-start it, and then it goes back to cold - but I have not ascertained whether that was actually helping. 

    In these scorching Southern California summers (105 degrees today!) I NEED my A/C!  Thank you for all your assistance!

    Greg Conte
    West Hills, CA
    1991 MBZ 500SL

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