a/c unit runs great, but engine fan running constantly

Thatss what I was thinking with my same problem but want sure if over charged or under charged. Thanks

 

I have 2018 KW paccar engine and my fan is doing the same thing only when i turn on the AC. And i don't mean the normal cycling as much as necessary type.

Without the AC it runs at high speed if and only if the temperature gets too high outside causing the engine temp to rise, especially during city driving. It typically activates at 200+ guage temp.

With the AC on it's activating aggressively on and off in a constant manner even if the AC set temp is equal to outside temp and in cool weather. It typically activates at 180.

This is a recent issue that happened suddenly just today. What could be the actual cause? Please help!

 

Faulty high pressure sensor could be your problem

 

Hello Sir.
Did you fix the issue?