[AT] OT: sleeper air

[charlie hill]

Ron,   not knowing a thing about that system, I'm assuming the rear air is 
turned on by an electric switch on the dash somewhere or back in the 
sleeper.  Is it possible that the switch, after sitting up so long, is 
corroded and not making contact?  Or as Farmer would say.... Check the 
grounds!  It might not be a problem in the AC at all but just a control 
problem.

Charlie

-----Original Message----- 
From: Ron Cook
Sent: Sunday, July 08, 2012 1:11 AM
To: Antique tractor email discussion group
Subject: Re: [AT] OT: sleeper air

Cecil,
     Thanks for the tip.  It acts just like a valve is not opening. I
did not get a chance to look at the unit yet, but I did look in the
manual.  I think I have a Behr unit and they do not use a solenoid valve
according to the manual, just the expansion valve. But that does not
always tell the truth about how things really are.  I do know there is
no valve where they tee off, but the Red Dot units do have a freon
solenoid just inside the unit under the cover.  I'll take a look at it
maybe tomorrow.

Ron Cook
Salix, IA

On 7/7/2012 1:00 PM, Cecil R Bearden wrote:
> Ron:
> Does it have a solenoid valve that opens to allow freon to the sleeper
> evaporator?  If so, it might just be a bad connection or wiring
> problem.   I have not had that much problems with expansion valves...
> However, I may be having one on my big van...
> If there is no temp change on your lines, then there is probably no
> freon circulating.  I would look for a valve on the lines going to the
> back or where they tee off the main line.
>
> Cecil in OKla
>
> On 7/7/2012 10:52 AM, Ron Cook wrote:
>> Yesterday it was hot enough that I decided to run the sleeper air in my
>> Freightliner to augment the cab air.  I have not run that sleeper air
>> for a few years, I suppose.  3, maybe 4.
>>
>> No cooling happening there!  Apparently no refrigerant passing through
>> the evaporator at all.  No hot nor cold line to the touch. Do you
>> suppose that expansion valve is stuck or plumb plugged up with foreign
>> matter?  That has to be where the problem lies.  Some disassembly
>> required, I think.
>>
>> Front air works good, I just wanted to turn it into a meat locker, I
>> guess.:-)
>>
>> Ron Cook
>> Salix, IA
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