Thanks Loren - I guess Brian's response gives the TS hint - reduced airflow - if the evap is icing up. Car is relatively new to me, and at least two prior repairs (I use the term loosely) were of such low quality that it wouldn't surprise me if any AC work done was also done poorly. I do have a R123 gauge, I would imagine icing inside a line would show an unusually high high-side pressure?
-Max -----Original Message----- From: mercedes-boun...@okiebenz.com [mailto:mercedes-boun...@okiebenz.com] On Behalf Of Dieselhead Sent: Wednesday, September 29, 2010 9:51 AM To: Mercedes Discussion List Subject: Re: [MBZ] AC diagnosis - cause of AC fade-out? Could be icing up the evap or could have ice blocking the line if it was not evacuated well last time. >On my '95 E300, the AC starts out strong, but after about 20 minutes it >is noticeably weaker and eventually it fades completely away (goes from >very cold to cold to sort-of-cold to ambient). AC compressor clutch is >staying engaged. > >Could this be a leaking monovalve insert? Next time I can play, I'll >see if the refrigerant lines are still cold. > >Very respectfully, >/s/ >Max Dillon >'87 300TD 329k miles >'95 E300 275k miles (On the Road!) >'73 Balboa 20 >Charleston SC > > > >_______________________________________ >http://www.okiebenz.com >For new and used parts go to www.okiebenz.com To search list archives >http://www.okiebenz.com/archive/ > >To Unsubscribe or change delivery options go to: >http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com