[Shotimes] A/C woes

[Kevin & Cheryl Airth]

Jason:
 The low pressure switch will shut the compressor down at 28-30 psi. It's
adjustable so there is a range over which it will operate. Remember that on
the low side the pressure is pretty close to the evaporator temperature and
you don't want that to be below 32 F. or it will freeze up. You either don't
have enough Freon or you have a restriction somewhere in the system. Like
the other suggestions you got, you need to see what the high side pressure
is doing at the same time.
.
.



> Hey gang, I have a perplexing question. I recharged the A/C system in
> the wife's car up to about 45 psi, but the damned thing still won't blow
> cold air. I looked at the clutch, and it's rhythmically cycling on and
> off on MAX A/C. I did the broomstick (actually mop handle in this case)
> test with no different results. It'll turn on for about half a second
> then shut off for about 3. I hooked a pressure gauge up to the low
> pressure port and it was at 45 right before it would cycle, then it'd
> turn on and immediately drop to about 20, at which point it'd shut off.
> then it would slowly get back up to 45 before it'd try again. wtf is up
> with that?


> Jason Hartberger, AT3 USN
> USS Theodore Roosevelt CVN-71
> AIMD/IM-3 CASS