Chassis A/C

[putneyflash@...]

you can jump across the contacts for the switch if compressor comes on ok, but
that doesn/t mean the switch is bad if you lose freon the low pressure switch
shiuts off the compressor,

-------------- Original message from David Brady :
--------------

Thanks Randy, I'll try that in the morning. I could use a
lesson on the theory of operation. You mention the low
pressure switch. Without getting into the heat pump stuff
of compressing gas and letting it expand at a lower pressure
and consequently creating a cooling effect, which I basically
understand, what's in the control path that makes this
system work? What does the low pressure switch do? Are
there other sensors/switches? AFAIK, the system does
not use a thermostat; ie, it's either on or off. I guess she
compresses until the low pressure switch turns her off and
then when low pressure is hit again, the compressor
engages. There may be some hysteresis in here too. So
when I press the blue a/c switch on the dash, what does
that do?

Thanks,
David Brady
'02 LXi, Smokey, Va

randydupree2000 wrote:

>---ok,so now get a test light and check to see if you have power to
>the low pressure switch,if so,and the power is not going through the
>switch you have either a bad switch,or no freon in the system.
>randy In WanderlodgeForum@yahoogroups.com, David Brady
>wrote:
>
>



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