[W126 Coupe] AC Problem Part 3

[airedale at sbcglobal.net]

Did they charge it too? Why not take it back to them with your complaint?
John
----- Original Message ----- 
From: "Tom Oelsner" <toelsner at mindspring.com>
To: "Mercedes Coupes Mailing Lists" <mbcoupes at mbcoupes.com>
Sent: Tuesday, October 11, 2005 2:56 PM
Subject: RE: [W126 Coupe] AC Problem Part 3


> The system was evacuated by a shop and then had the gauge left in place 
> for
> several hours to check for leaks.  All clear on that front.  The system is
> fully charged.  How does one go about looking for restrictions in the 
> lines?
> Tom
>
> -----Original Message-----
> From: mbcoupes-bounces at mbcoupes.com
> [mailto:mbcoupes-bounces at mbcoupes.com]On Behalf Of
> airedale at sbcglobal.net
> Sent: Tuesday, October 11, 2005 12:51 PM
> To: Mercedes Coupes Mailing Lists
> Subject: Re: [W126 Coupe] AC Problem Part 3
>
>
> Did you do part 1 yourself? If so did you evacuate the system to get the
> moisture out? If a shop did it take it back to them. To part 3. Is there a
> restriction to your condenser or evaporator coil, I have seen items pulled
> through the return air that restrict air flow. Under charging will cause 
> the
> evaporator to freeze up and impair cooling. The usual air that comes 
> through
> my supply vent in my '91 560SEC on a 90 or so degree day is between 50 and
> 60 degrees. I notice the AC systems in the 89 through 91 hold more R12 
> than
> the 86 through 88. I do not know about the models before that.
> John
> ----- Original Message -----
> From: "Tom Oelsner" <toelsner at mindspring.com>
> To: <mbcoupes at mbcoupes.com>
> Sent: Tuesday, October 11, 2005 1:32 PM
> Subject: [W126 Coupe] AC Problem Part 3
>
>
>> ok...here we go again.  Just as a reminder;
>> Part 1. Get the AC running.  Replaced the compressor O rings, replaced 
>> the
>> receiver-drier, new AC belt, no leaks at all and rock solid.  Charged the
>> system.  cold air!
>> Part 2. Belt squeal.  Belt keeps loosening (stretching?). retightened
>> twice
>> and loose again even though the idler pulley is tight.  Any ideas?
>> Jonathan, it is a Continental belt.
>> Part 3.  THE NEW ONE.  Had very cold air until about a week ago.  Now it
>> is
>> only really cold if I am going above 75mph or if the outside temp is
>> around
>> 70F.  At lower speeds the air is somewhat cool at best.  Engine temp is
>> definitely in range  with AC on, 85C to 95C(?) and there is still plenty
>> of
>> refrigerant in the system.  Any ideas?  Thanks for your thoughts.
>>
>> Tom Oelsner
>>
>>
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>
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>
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