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  #1  
Old 11-23-2005, 04:44 PM
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Join Date: Nov 2005
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I need help

how do i get heat in a 1988 sel mercedes 650?

I just got the car not too long ago and cannot seem to get heat. I have changed the thermostat thinking that was the problem but its not. I can only get cold air....please help.....

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  #2  
Old 11-23-2005, 04:53 PM
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Join Date: May 2000
Location: Soperton, Ga. USA
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Do a search on monovalve. Sounds like you may need to replace it.
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Old 11-23-2005, 05:00 PM
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Location: France
Posts: 487
Touch the hoses on the monovalves, ie before from engine and after to the heating radiator , if that one before is warm (be carfull temperature can reach 85°c) and the other not, there is the problem.
if there is an auxillairy pump you should ear the sound and feel pressure schocks on the hose.

Good luck

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