Re: A/C problems

[healey@lerc.nasa.gov (jim healey)]

>
> Jim H replied:
> 
>> It's my understanding after talking to someone who has rebuilt several
>> that the point of failure is a solenoid, almost always the same one too.
>> So its worth holding on to the old one and doing some snooping, if the 
failure
>> occurs again you can cannabalize to get one good unit.
>> 
>
>Jim,
>	Are you thinking of the A/C Programmer rather than the Control
>Head? If my memory serves right, I don't recall seeing any solenoids
>in the Control Head when I had it apart. The Control Head (at least on
>the 86 to 88 5000 series) is purely electronic - has no moving mechanical or
>vacuum connections or parts inside. The A/C Programmer on the other hand
>reportedly has many vacuum solenoids that get sticky/dirty and malfunction.
>The A/C programmer is located behind the glove compartment and has many
>vacuum hoses connected.
>
Thanks for the correction Zafer, since I wasn't speaking from direct 
experience, I had a feeling I might get something wrong and figured
someone would correct me.

jim h

>
>-----------------------------------------------------------------
>Zafer Mehmood				   AT&T Bell Laboratories
>zm@mhcnet.att.com			   Murray Hill, NJ
>
>