2000 Jeep Cherokee A/C trouble?

On my 2000 Cherokee Sport, with the straight 6 (V6) 4.0 liter, automatic, my a/c is acting weird.





The a/c is fully charged. When I start the car, the a/c works fine. Then, as I drive and the car warms up, the a/c will suddenly stop working and it starts blowing warm air. I shut the a/c off, wait about 10 or 15 mins, and it is blowing cold again. Then, after a little bit, it blows warm air again, and this repeats.





Why does the a/c seem to "shut itself off" after a little bit, and then start working again?





Thanks,


Sweating in Kentucky!!

2000 Jeep Cherokee A/C trouble?
you have 1 of 2 problems.


most common is slightly under charged. to check attach gauge to low side, start engine and turn AC on max. run engine at 1200 to 1500 RPM. watch low PSI if it drops below 40psi add a little more freon r134a. if the psi increases above 45 you have a blockage or over charge. you will need a gauge on the high pressure side to determine which the cause is.
Reply:Sounds like the compressor clutch is disengaging, causing the warm air.
Reply:These systems are prone to clogging with things. The orifice tube is general we have that issue all the time. The only other thing that can cause that is a "low charge" since you say its charged I would suspect a clogg. We had 5 of those engines in the shops this week alone with the same issue. The 98-2002 seam to clogg more the others and we can't figure out why. The newer ones so far don't.
Reply:check for water coming out the drip tube, if there's no water check to make sure it's not plugged......... it sounds like the system is freezing up my need attention from an ac guy
Reply:you may need a new air commpressor
Reply:FIRST HAVE SOMEONE CHECK AND MAKE SURE THAT YOU HAVE POWER AND GROUND TO THE CLUTCH COIL WHEN THIS HAPPENS.





IF YOU DO NOT THEN CHECK THE PRESSURE SWITCH FOR POWER AND GROUND.





IF YOU HAVE BOTH POWER AND GROUND AT THE CLUTCH AND SWITCH AND THE CLUTCH IS DISENGAGED, IT COULD BE THAT THE CLUTCH COIL IS EITHER SHORTED INTERNAL OR THAT THE FRONT HUB ASSEMBLY HAS TOO MUCH GAP.





THE GAP CAN BE ADJUSTED BY REMOVING THE HUB AND REMOVING SOME OF THE SHIMS THAT ARE ON THE SHAFT.





IF THE GAP IS OKAY LIKE BETWEEN 30 TO 35 THOUSAND'S BUT THE COIL IS SHORTED, THEN YOU CAN EITHER REPLACE THE COMPLETE CLUTCH ASSEMBLY OR JUST THE COIL.