J,
Pass me the bone you are smoking...
Have the system evacuated, replace the Orifice Tube, and add fresh lubricant to the system.
Then evacuate and recharge it.
You may have some moisture trapped in the AC drier, that once it gets into the system,
will freeze up the Orifice Tube, and cause a high pressure build up.
This triggers the High Pressure switch which shuts down the AC.
Since the comrpressor is a ONE WAY pump, the pressure will not relieve itself right away.
It takes quite some time for the high pressure to bleed down.
Once it does, the system has risen to ambient temperture and the AC Compressor
kicks in again to restart the whole cycle.
If the orifice tube is blocked up with metal shavings, your compressor may need to be replaced.
If it is blocked up with rubber, you may have a hose that is deteriorating on the inside.
If it is just iced up, then the AC was never evacuated correctly when it was assembled,
or last serviced.
NOT using your AC doesn't let refrigerant settle in different places.
The refrigerant is a gas and is throughout the system.
The synthetic lubricant will settle in the bottom of the tubes,
and the seals will not be thorougly lubricated, until the refrigerant
is pumped around, and it picks up the lubricant and spreads it throughout the system.
That is why you should run your DEFROSTER for the first 10 minutes you are in your car in the winter.
The Defroster uses the AC to dry the moisture from the air before it is heated and directed at your windshield.
If warm moist air was directed at your windshield, in the winter, it would
condensate immediately on the windshield, and block your view.
