[DML] Re: AC clutch running continuously
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[DML] Re: AC clutch running continuously



YOu spent a lot of money with John so he should be helpful with your
problem. Something is very wrong if the compressor will run
continuosly on 12 oz. The low pressure switch should be shutting the
system down. Is the low pressure switch jumped out? You do need to do
that to charge the system but then remove the jumper after setting the
initial charge. On 12 oz the system should go below atmospheric even
with -134. I suggest you do NOT use -134. Either find some -12 or one
of the substitutes like -414b. You should also have drained and
refilled the A/C compressor with fresh oil and replaced the service
valve cores. You cannot properly pressure test an A/C system with
vacuum. You should pressurize to at least 100 psi with an inert charge
and then test for leaks.
David Teitelbaum
vin 10757



--- In dmcnews@xxxxxxxxxxxxxxx, Kevin Heller <howdyhoho@...> wrote:
>
> I just installed John Hervey's spliced AC lines along
> with new high pressure hub, AC orifice, and
> Accumulator/Drier. Vacuumed the system for 20 minutes
> last night and checked it this morning to find the
> vacuum was holding. 
> 
> I decided to start charging the system and put in one
> small 12oz can of R134A (340mg). After putting this
> in, the pressure gauge on the lowside is reading
> ~45psi (high on the nominal reading and low
> overcharged according to the gauge). In addition, the
> compressor never cycles and pressure reading stays
> constant at 45, all on one small can. 
> 
> Any idea why this may be? According to the service
> manual the compressor inlet screen should be checked
> for clogs. I don't recall see anything when the system
> was open, but admittedly the possibility of the inlet
> screen being clogged wasn't on my mind.
> 
> The air coming out of the vent is slightly cooler than
> ambient. And I can see a clear liquid sloshing around
> in the high pressure hub sight glass.
> 
> 
> Thanks, I know it's a little late in the season for
> this lol
> 
> -Kevin
> VIN 2234
> 
> 
> 
> 
>        
>
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