[W126 Coupe] 1985 500 SeC

[Shayegan, Richard]

The rear center vents only blows cold air. The rear heat come from vents
under the front seats, so close that center vent when it gets cold
outside. 


> -----Original Message-----

> From: mbcoupes-bounces at mbcoupes.com 

> [mailto:mbcoupes-bounces at mbcoupes.com] On Behalf Of jeffrey maniff

> Sent: Sunday, February 18, 2007 8:32 PM

> To: mbcoupes at mbcoupes.com

> Subject: Re: [W126 Coupe] 1985 500 SeC

> 

> I own a 1985 500 SEC (Euro Version) and I notice that my 

> front heat works great but while that blows hot air if I 

> reach my right arm behind me to the 

> rear vents it is freezing cold all the time.  Can anyone 

> explain this?   I 

> just replaced my compressor prior to the winter and changed 

> over my a/c to the appropriate RU series  but I can't explain 

> why I blow cold air in the 

> back while simultaneously blowing very hot air in the front.  

>   I am at a 

> loss.....

> Thank you for any help.

> Jeff Maniff

> 

> 

> >From: "Axel Wulff" <axelwulff at hotmail.com>

> >Reply-To: Mercedes Coupes Mailing Lists <mbcoupes at mbcoupes.com>

> >To: mbcoupes at mbcoupes.com

> >Subject: Re: [W126 Coupe] 1985 500 SeC

> >Date: Sun, 18 Feb 2007 13:59:15 -0500

> >

> >Rick,

> >

> >Did you try changing the Monovalve?

> >

> >It sits above the auxiliary water pump you mentioned you 

> have checked out.

> >

> >Otherwise, I'd suspect the fan that pulls air in from the 

> compartment 

> >may be malfunctioning. The inlet for this fan is next to the 

> rearview 

> >mirror. Put the heater to defrost and with a light piece of foil or 

> >paper, try to see if there is any suctions there.

> >

> >If this fan is malfunctioning, the ACC unit will measure the temp of 

> >the air in the dash and will "think" the car is nice and toasty.

> >

> >

> >

> >Regards,

> >Axel J. Wulff

> >610-731-5453 Cellular

> >610-572-4611 Home

> >

> >

> >

> >

> >

> > >From: WRick11499 at aol.com

> > >Reply-To: Mercedes Coupes Mailing Lists <mbcoupes at mbcoupes.com>

> > >To: mbcoupes at mbcoupes.com

> > >Subject: [W126 Coupe] 1985  500 SeC

> > >Date: Sun, 18 Feb 2007 13:41:24 EST

> > >

> > >Its cold here in MD. and my heater is acting crazy. Some 

> times works 

> > >and sometimes not.I bought a rebuilt  climite control unit and it 

> > >does the same thing.Some times the defroster blows hot and 

> the center 

> > >vents blows cold and

> > >sometimes every thing works alright but most of the time   

> all  blow

> > >cold.The

> > >small pump on the firewall seems to be working plus I bought  a

> >newOverload

> > >relay.If I disconect  a battery cable and then replace  

> it, itseems 

> > >to be O.K. till I turn the key off, so I think it must be  

> > >electrical, are there other relays that I should check and 

> where are 

> > >they  located in the fuse box, has

> >anyone

> > >else had a problem like this.Thanks for  any help    Rick

> >

> >

> > >The MB Coupes Website!

> > >W126 SEC Mailing List

> > >Postings remain property of MB Coupes, L.L.C.

> >

> >

> >The MB Coupes Website!

> >W126 SEC Mailing List

> >Postings remain property of MB Coupes, L.L.C.

> 

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