Auto Air Conditioning & Heater Repair: 1998 GMC A/C Issues, gmc sierra, sympton

Question
Thanks for the time. 1998 GMC Sierra. A/C blows ice cold for first few minutes truck is running. Then goes warm. After a few minutes it starts to blow cold again. Another sympton is after you shut the truck off and it's hot then start it again the a/c will blow warm. Bottom line is when it blows cold it's cold enough for me. It just isn't consistent. Recharge? Switch? Any info is greatly appreciated.

Answer
Hi Freddy


It is difficult to tell you without being able to check it.  But from experience Check your cycling switch first.  If you can get me some pressure reading and if you can reading when it just turns off.  This may help me to determine what is going on.