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  #1  
Old 12-15-2003, 04:17 AM
Jim Dandy's Avatar
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Join Date: Nov 2003
Location: Oklahoma
Posts: 157
420 SEL: No Rear Heat

My 420 SEL recently had no heat, so I replaced the monovalve. Now I have heat in the front (and defrost), but no heat for the rear passenger compartment. Anyone?
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  #2  
Old 12-15-2003, 10:10 AM
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Join Date: Jul 2002
Location: Trenton, NJ
Posts: 248
Jim,

One thing to keep in mind is that heat in the rear on these cars comes through ducts under the front seats, NOT through the vent at the back of the center console (that's for fresh air only).

I'm not sure where it is, but the problem you're having is probably related to the dampers that control air flow into these ducts. I believe this is under the dash/part of the main center console. However you probably should check to make sure that there isn't anything, such as carpeting, blocking the vents where they exit under each front seat. You can see them if you move the front seats all the way up and forward.

jlc
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'87 560SEL 267K (177K on motor) Blue/Blue
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'56 Imperial Sedan 124K
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'87 Chrysler 5th Ave 245K and going strong (sold)
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  #3  
Old 12-15-2003, 10:18 AM
Jim Dandy's Avatar
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Join Date: Nov 2003
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If I'm following what you're posting, I don't have anything wrong. I have beaucoup heat from the floor vents, just cold air from the rear center vent. Good to know. Thanks.
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  #4  
Old 12-15-2003, 02:16 PM
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Join Date: Jul 2002
Location: Trenton, NJ
Posts: 248
Jim,

You're welcome. This is a common question this time of year for folks new to life with a W126 - I asked it two years ago as well. Just close the lever on the center vent to cut off the cold air in back (unless, of course, it's your mother-in-law who sits in back )

jlc
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Jeff

'87 560SEL 267K (177K on motor) Blue/Blue
'98 Buick LeSebre 60K (wife's car)
'56 Imperial Sedan 124K
Past Cars:
'67 Dodge Monaco 130K (Sold)
'87 Chrysler 5th Ave 245K and going strong (sold)
'73 Plymouth Satillite 175K (sold)
'96 Chrysler LHS 80K (totaled)
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  #5  
Old 12-15-2003, 03:55 PM
Jim Dandy's Avatar
Cat Herder
 
Join Date: Nov 2003
Location: Oklahoma
Posts: 157
Quote:
This is a common question this time of year for folks new to life with a W126
New, I am. I just got this at the end of October.

Quote:
Just close the lever on the center vent to cut off the cold air in back
That's what I did thinking it was just an interim fix.

Quote:
unless, of course, it's your mother-in-law who sits in back
Actually, she gave me the car. I have to stay on her good side!!!
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  #6  
Old 12-16-2003, 12:30 AM
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Join Date: Dec 2001
Location: LaPorte, IN
Posts: 400
"quote:
--------------------------------------------------------------------------------
unless, of course, it's your mother-in-law who sits in back
--------------------------------------------------------------------------------


Actually, she gave me the car. I have to stay on her good side!!!"

Does your wife have a sister? Does your mother-in-law have another 420??
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'89 560 SEL "Frau BlueCar" (retired April 2004)
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