[R129 SL] air conditioning issue

[Jonathan Hodgman]

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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