[judd047]

My 88 560SL is blowing hot air through the ducts.
This is with a/c and heater off.
Any idea what's up with this and how to fix it?
Thanks for any info

 

[reno4u2]

I'd start out by taking a look at the monovalve...do a forum search. Repair kits are available and it's an easy DIY...should it be the problem. Sometimes the seals have a split into them...Here's one to get you started...

http://www.benzworld.org/forums/r-c107-sl-slc-class/1635588-monovalve-repair-pics-86-560sl.html

 

[judd047]

Thanks for the info.
I have replaced the monovalve (shoud have said that in original post)
That did not solve the problem.
Any other solutions?