[W126 Coupe] Climate Control Problems 1983 380SEC

[Dick Spellman]

Hi Greg:

First, if your dealer is having to recharge the system after just 1.5 
days and says there is no leak - that makes no sense.  Either he's 
recharging or he's not.  If he's recharging he should be using a dye and 
then looking for the leak where the dye will appear after the 1.5 days 
you suggest.  If the compressor is shutting off prematurely, then what 
is your coolant temp when this happens?

As for the ACC dial, where you describe it functions to full cold or 
full hot only, that suggests the mono-valve is sticking.  Just buy the 
rebuild kit for the monovalve which is something in the area of $25US 
and takes about 15 minutes on the 380SEC 1983 where there is less to 
move out of the way on the early year 126.

As for the blower working then quitting is this in the AUTO mode or in 
the high speed fan mode?  If it's in the AUTO mode it could well be the 
ACC, just try switching to LOW fan the next time it does that and report 
back if the fan worked or not after making the switch to LOW.

Take care,

Dick

kashella at comcast.net wrote:

> I have a 1983 model 380sec.  Having trouble with climate control 
> system (heating/ac). 
>  
> After dealer charges, charge holds about 11/2 days.  Dealer tells me 
> not leaking.
>  
> Also have problem that to get cool have to move temp control all the 
> way to cold. Then to get off, move to heat all the way.  If I move to 
> moderate temp in middle, get whatever was on heat or cold.  Bot car in 
> 2003.  In 2003 the temp blend control worked.  Also now will be 
> blowing full blast then just shut off with cabin still hot.
>  
> Is the temp control bad causing compressor to run wrong and blow the 
> freon out the relief valve?
>  
> Thank you,
>  
> Greg Kashella
>
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