Ac Is Warm While Idling

[Kuma781]

 I have the exact same problem. I have a 2002 Chevy Silverado 1500 series and at idle It overheats and the air conditioner stops working. I have previously had it charged and that only helped for about a month. I also replaced the fan clutch. To no avail.  You can hear the compressor kicking off the makes a loud thump. The vehicle only cools down when bringing the RPMs up to 2,000 and the air conditioner works fine at that point. I noticed the new fan clutch is working and it seems to be spending when it's overheating. One more important thing that I noticed today was I didn't even have to have it at a higher RPM the temperature went down when I was coasting down the hill for 2 miles and started blowing really cold air

Edited June 27, 2018 by Kuma781
additional information was added

[rjgti]

rad is pluged or thermostat, blow the rad out

[sefiroxx]

Safety feature, ac shuts off when temperature rises.

[Gboyer]

I have a 2008 gmc 2500 hd sierra diesel. My ac cycles between recirc and outside air...plus at idle my ac light goes out and hot air blows until I drive and light comes back on and ac cold..any suggestions

 

The AC was just serviced by GMC

Edited August 28, 2019 by Gboyer

[sefiroxx]

Auto ac? Air temp sensor may be failing

[Gerrit Schmitz]

Refrigerant is extremely low. Keep adding Refrigerant until ac compressor stays on then you can get an accurate reading.