[DML] Re: Air Condition at Highway Speeds

["David Teitelbaum" <jtrealty@xxxxxxxxxxx>]

There could be several reasons you are not cycling:
Too much freon
incorrectly set low pressure switch
not enough airflow or blocked condensor coil
not enough airflow or blocked evaporator coil
Head pressure too high (either too much freon again or air in the system).
A contaminated system with a plugged orifice tube. 
The place to start is to get a set of gauges on the car and see what
the pressures are. You can also clean the coils (a good idea in any
case) and the A/C should stop when you pull the plug off the low
pressure switch. This confirms that at least the wiring is correct to
the switch. It is important that the system cycles. This is the way it
keeps from frosting the evap coil.
David Teitelbaum
vin 10757


--- In dmcnews@xxxxxxxxxxxxxxx, Marc Levy <malevy_nj@xxxx> wrote:
> We discussed this on the other list Bob..
> 
> I told you, it is possible that when you recently
> replaced your AC hose the system was not evacuated and
> charged properly.
> 
> Assuming you have an earlier car that only has the
> low-pressure switch, it is possible the high is WAY
> TOO HIGH causing it to create extra heat in front of
> the radiator.
> 
> 






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