Peter, The W124 does not have a monovalve like the earlier cars... it's a different design that rarely leaks. With the AC off and the vent on min temp, I always get ambient air, not slightly heated, so I'm almost certain the monovalve is not the issue. I have an R-12 system with actual R-12 (gasp!) and I hope the expansion valve is not the problem, since that requires evacuation to repair, and the old R-12 valve is not available from the dealer anymore (not sure if we can still get it via aftermarket or not.) I'm still hoping for a simple fix with the B10/6 evap sensor....
:-) -Dave M. > ------------------------------ > Date: Tue, 9 Aug 2005 17:13:51 -0500 > From: Peter Frederick <[EMAIL PROTECTED]> > Subject: Re: [MBZ] W124 A/C question - compressor cuts off too soon? > > Does your monovalve leak? Are the pressures correct (i.e. does the > expansion valve work properly)? The actual evaporator temp is > controlled by the expansion valve, so if it runs a bit warm, so will > the evaporator (or if it has some crud in it). They are fairly easy to > replace. > > If the monovalve leaks, you have reheat when you don't want it. > > My TE is quite cold, AC works a charm. On the 300D, it's only cool at > idle, cold above 1000 rpm. > > Unless you have a bigger condenser, R134a will run a bit warm above > 100F outside temp, worse with high humidity like we have here. > > Peter
